diff --git a/zh-cn/application-dev/reference/apis/js-apis-ability-context.md b/zh-cn/application-dev/reference/apis/js-apis-ability-context.md
index c71cc797f35cbb52acd9e232069d308c67ffc44e..68913e83d94e67ca66b91b7f1546f83fa822e09e 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-ability-context.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-ability-context.md
@@ -64,7 +64,7 @@ startAbility(want: Want, callback: AsyncCallback<void>): void;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     bundleName: "com.example.myapp",
     abilityName: "MyAbility"
   };
@@ -106,7 +106,7 @@ startAbility(want: Want, options: StartOptions, callback: AsyncCallback<void&
 | 参数名 | 类型 | 必填 | 说明 |
 | -------- | -------- | -------- | -------- |
 | want | [Want](js-apis-application-want.md)  | 是 | 启动Ability的want信息。 |
-| options | [StartOptions](js-apis-application-startOptions.md) | 是 | 启动Ability所携带的参数。 |
+| options | [StartOptions](js-apis-app-ability-startOptions.md) | 是 | 启动Ability所携带的参数。 |
 | callback | AsyncCallback<void> | 是 | callback形式返回启动结果。 |
 
 **错误码：**
@@ -119,12 +119,12 @@ startAbility(want: Want, options: StartOptions, callback: AsyncCallback<void&
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var options = {
+  let options = {
     windowMode: 0
   };
 
@@ -164,7 +164,7 @@ startAbility(want: Want, options?: StartOptions): Promise<void>;
 | 参数名 | 类型 | 必填 | 说明 |
 | -------- | -------- | -------- | -------- |
 | want | [Want](js-apis-application-want.md) | 是 | 启动Ability的want信息。 |
-| options | [StartOptions](js-apis-application-startOptions.md) | 否 | 启动Ability所携带的参数。 |
+| options | [StartOptions](js-apis-app-ability-startOptions.md) | 否 | 启动Ability所携带的参数。 |
 
 **返回值：**
 
@@ -182,11 +182,11 @@ startAbility(want: Want, options?: StartOptions): Promise<void>;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     bundleName: "com.example.myapp",
     abilityName: "MyAbility"
   };
-  var options = {
+  let options = {
   	windowMode: 0,
   };
 
@@ -213,7 +213,10 @@ startAbility(want: Want, options?: StartOptions): Promise<void>;
 
 startAbilityForResult(want: Want, callback: AsyncCallback<AbilityResult>): void;
 
-启动一个Ability。Ability被启动后，正常情况下可通过调用[terminateSelfWithResult](#abilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用者。异常情况下比如杀死Ability会返回异常信息给调用者（callback形式）。
+启动一个Ability。Ability被启动后，有如下情况(callback形式):
+ - 正常情况下可通过调用[terminateSelfWithResult](#abilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用方。
+ - 异常情况下比如杀死Ability会返回异常信息给调用方, 异常信息中resultCode为-1。
+ - 如果被启动的Ability模式是单实例模式, 不同应用多次调用该接口启动这个Ability，当这个Ability调用[terminateSelfWithResult](#abilitycontextterminateselfwithresult)接口使之终止时，只将正常结果返回给最后一个调用方, 其它调用方返回异常信息, 异常信息中resultCode为-1。
 
 使用规则：
  - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
@@ -239,7 +242,7 @@ startAbilityForResult(want: Want, callback: AsyncCallback<AbilityResult>):
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
@@ -268,7 +271,10 @@ startAbilityForResult(want: Want, callback: AsyncCallback<AbilityResult>):
 
 startAbilityForResult(want: Want, options: StartOptions, callback: AsyncCallback<AbilityResult>): void;
 
-启动一个Ability。Ability被启动后，正常情况下可通过调用[terminateSelfWithResult](#abilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用者。异常情况下比如杀死Ability会返回异常信息给调用者（callback形式）。
+启动一个Ability。Ability被启动后，有如下情况(callback形式):
+ - 正常情况下可通过调用[terminateSelfWithResult](#abilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用方。
+ - 异常情况下比如杀死Ability会返回异常信息给调用方, 异常信息中resultCode为-1。
+ - 如果被启动的Ability模式是单实例模式, 不同应用多次调用该接口启动这个Ability，当这个Ability调用[terminateSelfWithResult](#abilitycontextterminateselfwithresult)接口使之终止时，只将正常结果返回给最后一个调用方, 其它调用方返回异常信息, 异常信息中resultCode为-1。
 
 使用规则：
  - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
@@ -282,7 +288,7 @@ startAbilityForResult(want: Want, options: StartOptions, callback: AsyncCallback
 | 参数名 | 类型 | 必填 | 说明 |
 | -------- | -------- | -------- | -------- |
 | want |[Want](js-apis-application-want.md) | 是 | 启动Ability的want信息。 |
-| options | [StartOptions](js-apis-application-startOptions.md) | 是 | 启动Ability所携带的参数。 |
+| options | [StartOptions](js-apis-app-ability-startOptions.md) | 是 | 启动Ability所携带的参数。 |
 | callback | AsyncCallback<[AbilityResult](js-apis-inner-ability-abilityResult.md)> | 是 | 执行结果回调函数。 |
 
 **错误码：**
@@ -295,12 +301,12 @@ startAbilityForResult(want: Want, options: StartOptions, callback: AsyncCallback
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var options = {
+  let options = {
     windowMode: 0,
   };
 
@@ -328,7 +334,10 @@ startAbilityForResult(want: Want, options: StartOptions, callback: AsyncCallback
 
 startAbilityForResult(want: Want, options?: StartOptions): Promise<AbilityResult>;
 
-启动一个Ability。Ability被启动后，正常情况下可通过调用[terminateSelfWithResult](#abilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用者。异常情况下比如杀死Ability会返回异常信息给调用者（promise形式）。
+启动一个Ability。Ability被启动后，有如下情况(promise形式):
+ - 正常情况下可通过调用[terminateSelfWithResult](#abilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用方。
+ - 异常情况下比如杀死Ability会返回异常信息给调用方, 异常信息中resultCode为-1。
+ - 如果被启动的Ability模式是单实例模式, 不同应用多次调用该接口启动这个Ability，当这个Ability调用[terminateSelfWithResult](#abilitycontextterminateselfwithresult)接口使之终止时，只将正常结果返回给最后一个调用方, 其它调用方返回异常信息, 异常信息中resultCode为-1。
 
 使用规则：
  - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
@@ -342,7 +351,7 @@ startAbilityForResult(want: Want, options?: StartOptions): Promise<AbilityRes
 | 参数名 | 类型 | 必填 | 说明 |
 | -------- | -------- | -------- | -------- |
 | want | [Want](js-apis-application-want.md) | 是 | 启动Ability的want信息。 |
-| options | [StartOptions](js-apis-application-startOptions.md) | 否 | 启动Ability所携带的参数。 |
+| options | [StartOptions](js-apis-app-ability-startOptions.md) | 否 | 启动Ability所携带的参数。 |
 
 
 **返回值：**
@@ -361,11 +370,11 @@ startAbilityForResult(want: Want, options?: StartOptions): Promise<AbilityRes
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     bundleName: "com.example.myapp",
     abilityName: "MyAbility"
   };
-  var options = {
+  let options = {
   	windowMode: 0,
   };
 
@@ -422,12 +431,12 @@ startAbilityForResultWithAccount(want: Want, accountId: number, callback: AsyncC
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
+  let accountId = 100;
 
   try {
     this.context.startAbilityForResultWithAccount(want, accountId, (error, result) => {
@@ -472,7 +481,7 @@ startAbilityForResultWithAccount(want: Want, accountId: number, options: StartOp
 | -------- | -------- | -------- | -------- |
 | want | [Want](js-apis-application-want.md) | 是 | 启动Ability的want信息。 |
 | accountId | number | 是 | 系统帐号的帐号ID，详情参考[getCreatedOsAccountsCount](js-apis-osAccount.md#getosaccountlocalidfromprocess)。 |
-| options | [StartOptions](js-apis-application-startOptions.md) | 是 | 启动Ability所携带的参数。 |
+| options | [StartOptions](js-apis-app-ability-startOptions.md) | 是 | 启动Ability所携带的参数。 |
 | callback | AsyncCallback\<void\> | 是 | 启动Ability的回调函数。 |
 
 **错误码：**
@@ -485,13 +494,13 @@ startAbilityForResultWithAccount(want: Want, accountId: number, options: StartOp
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
-  var options = {
+  let accountId = 100;
+  let options = {
     windowMode: 0
   };
 
@@ -538,7 +547,7 @@ startAbilityForResultWithAccount(want: Want, accountId: number, options?: StartO
 | -------- | -------- | -------- | -------- |
 | want | [Want](js-apis-application-want.md) | 是 | 启动Ability的want信息。 |
 | accountId | number | 是 | 系统帐号的帐号ID，详情参考[getCreatedOsAccountsCount](js-apis-osAccount.md#getosaccountlocalidfromprocess)。 |
-| options | [StartOptions](js-apis-application-startOptions.md) | 否 | 启动Ability所携带的参数。 |
+| options | [StartOptions](js-apis-app-ability-startOptions.md) | 否 | 启动Ability所携带的参数。 |
 
 **返回值：**
 
@@ -556,13 +565,13 @@ startAbilityForResultWithAccount(want: Want, accountId: number, options?: StartO
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
-  var options = {
+  let accountId = 100;
+  let options = {
     windowMode: 0
   };
 
@@ -611,7 +620,7 @@ startServiceExtensionAbility(want: Want, callback: AsyncCallback\<void>): void;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
@@ -661,7 +670,7 @@ startServiceExtensionAbility(want: Want): Promise\<void>;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
@@ -715,12 +724,12 @@ startServiceExtensionAbilityWithAccount(want: Want, accountId: number, callback:
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
+  let accountId = 100;
 
   try {
     this.context.startServiceExtensionAbilityWithAccount(want, accountId, (error) => {
@@ -769,12 +778,12 @@ startServiceExtensionAbilityWithAccount(want: Want, accountId: number): Promise\
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
+  let accountId = 100;
 
   try {
     this.context.startServiceExtensionAbilityWithAccount(want, accountId)
@@ -820,7 +829,7 @@ stopServiceExtensionAbility(want: Want, callback: AsyncCallback\<void>): void;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
@@ -870,7 +879,7 @@ stopServiceExtensionAbility(want: Want): Promise\<void>;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
@@ -924,12 +933,12 @@ stopServiceExtensionAbilityWithAccount(want: Want, accountId: number, callback:
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
+  let accountId = 100;
 
   try {
     this.context.stopServiceExtensionAbilityWithAccount(want, accountId, (error) => {
@@ -978,12 +987,12 @@ stopServiceExtensionAbilityWithAccount(want: Want, accountId: number): Promise\<
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
+  let accountId = 100;
 
   try {
     this.context.stopServiceExtensionAbilityWithAccount(want, accountId)
@@ -1100,13 +1109,13 @@ terminateSelfWithResult(parameter: AbilityResult, callback: AsyncCallback&lt;voi
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     bundleName: "com.extreme.myapplication",
     abilityName: "SecondAbility"
   }
-  var resultCode = 100;
+  let resultCode = 100;
   // 返回给接口调用方AbilityResult信息
-  var abilityResult = {
+  let abilityResult = {
     want,
     resultCode
   }
@@ -1162,13 +1171,13 @@ terminateSelfWithResult(parameter: AbilityResult): Promise&lt;void&gt;;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     bundleName: "com.extreme.myapplication",
     abilityName: "SecondAbility"
   }
-  var resultCode = 100;
+  let resultCode = 100;
   // 返回给接口调用方AbilityResult信息
-  var abilityResult = {
+  let abilityResult = {
     want,
     resultCode
   }
@@ -1224,18 +1233,18 @@ connectServiceExtensionAbility(want: Want, options: ConnectOptions): number;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var options = {
+  let options = {
     onConnect(elementName, remote) { console.log('----------- onConnect -----------') },
     onDisconnect(elementName) { console.log('----------- onDisconnect -----------') },
     onFailed(code) { console.log('----------- onFailed -----------') }
   }
 
-  var connection = null;
+  let connection = null;
   try {
     connection = this.context.connectServiceExtensionAbility(want, options);
   } catch (paramError) {
@@ -1282,19 +1291,19 @@ connectServiceExtensionAbilityWithAccount(want: Want, accountId: number, options
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
-  var options = {
+  let accountId = 100;
+  let options = {
     onConnect(elementName, remote) { console.log('----------- onConnect -----------') },
     onDisconnect(elementName) { console.log('----------- onDisconnect -----------') },
     onFailed(code) { console.log('----------- onFailed -----------') }
   }
 
-  var connection = null;
+  let connection = null;
   try {
     connection = this.context.connectServiceExtensionAbilityWithAccount(want, accountId, options);
   } catch (paramError) {
@@ -1335,7 +1344,7 @@ disconnectServiceExtensionAbility(connection: number): Promise\<void>;
 
   ```ts
   // connection为connectServiceExtensionAbility中的返回值
-  var connection = 1;
+  let connection = 1;
 
   try {
     this.context.disconnectServiceExtensionAbility(connection)
@@ -1381,7 +1390,7 @@ disconnectServiceExtensionAbility(connection: number, callback:AsyncCallback\<vo
 
   ```ts
   // connection为connectServiceExtensionAbility中的返回值
-  var connection = 1;
+  let connection = 1;
 
   try {
     this.context.disconnectServiceExtensionAbility(connection, (error) => {
@@ -1433,10 +1442,10 @@ startAbilityByCall(want: Want): Promise&lt;Caller&gt;;
   后台启动：
 
   ```ts
-  var caller = undefined;
+  let caller = undefined;
 
   // 后台启动Ability，不配置parameters
-  var wantBackground = {
+  let wantBackground = {
       bundleName: "com.example.myservice",
       moduleName: "entry",
       abilityName: "MainAbility",
@@ -1464,10 +1473,10 @@ startAbilityByCall(want: Want): Promise&lt;Caller&gt;;
   前台启动：
 
   ```ts
-  var caller = undefined;
+  let caller = undefined;
 
   // 前台启动Ability，将parameters中的"ohos.aafwk.param.callAbilityToForeground"配置为true
-  var wantForeground = {
+  let wantForeground = {
       bundleName: "com.example.myservice",
       moduleName: "entry",
       abilityName: "MainAbility",
@@ -1530,12 +1539,12 @@ startAbilityWithAccount(want: Want, accountId: number, callback: AsyncCallback\<
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
+  let accountId = 100;
 
   try {
     this.context.startAbilityWithAccount(want, accountId, (error) => {
@@ -1579,7 +1588,7 @@ startAbilityWithAccount(want: Want, accountId: number, options: StartOptions, ca
 | -------- | -------- | -------- | -------- |
 | want | [Want](js-apis-application-want.md) | 是 | 启动Ability的want信息。 |
 | accountId | number | 是 | 系统帐号的帐号ID，详情参考[getCreatedOsAccountsCount](js-apis-osAccount.md#getosaccountlocalidfromprocess)。|
-| options | [StartOptions](js-apis-application-startOptions.md) | 是 | 启动Ability所携带的参数。 |
+| options | [StartOptions](js-apis-app-ability-startOptions.md) | 是 | 启动Ability所携带的参数。 |
 | callback | AsyncCallback\<void\> | 是 | 启动Ability的回调函数。 |
 
 **错误码：**
@@ -1592,13 +1601,13 @@ startAbilityWithAccount(want: Want, accountId: number, options: StartOptions, ca
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
-  var options = {
+  let accountId = 100;
+  let options = {
     windowMode: 0
   };
 
@@ -1644,7 +1653,7 @@ startAbilityWithAccount(want: Want, accountId: number, options?: StartOptions):
 | -------- | -------- | -------- | -------- |
 | want | [Want](js-apis-application-want.md) | 是 | 启动Ability的want信息。 |
 | accountId | number | 是 | 系统帐号的帐号ID，详情参考[getCreatedOsAccountsCount](js-apis-osAccount.md#getosaccountlocalidfromprocess)。 |
-| options | [StartOptions](js-apis-application-startOptions.md) | 否 | 启动Ability所携带的参数。 |
+| options | [StartOptions](js-apis-app-ability-startOptions.md) | 否 | 启动Ability所携带的参数。 |
 
 **错误码：**
 
@@ -1656,13 +1665,13 @@ startAbilityWithAccount(want: Want, accountId: number, options?: StartOptions):
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
-  var options = {
+  let accountId = 100;
+  let options = {
     windowMode: 0
   };
 
@@ -1758,9 +1767,9 @@ setMissionIcon(icon: image.PixelMap, callback:AsyncCallback\<void>): void;
 
   ```ts
     import image from '@ohos.multimedia.image';
-    var imagePixelMap;
-    var color = new ArrayBuffer(0);
-    var initializationOptions = {
+    let imagePixelMap;
+    let color = new ArrayBuffer(0);
+    let initializationOptions = {
        size: {
            height: 100,
            width: 100
@@ -1805,9 +1814,9 @@ setMissionIcon(icon: image.PixelMap): Promise\<void>;
 
   ```ts
     import image from '@ohos.multimedia.image';
-    var imagePixelMap;
-    var color = new ArrayBuffer(0);
-    var initializationOptions = {
+    let imagePixelMap;
+    let color = new ArrayBuffer(0);
+    let initializationOptions = {
       size: {
           height: 100,
           width: 100
@@ -1845,7 +1854,7 @@ restoreWindowStage(localStorage: LocalStorage) : void;
 **示例：**
 
   ```ts
-    var storage = new LocalStorage();
+    let storage = new LocalStorage();
     this.context.restoreWindowStage(storage);
   ```
 
@@ -1866,6 +1875,6 @@ isTerminating(): boolean;
 **示例：**
 
   ```ts
-  var isTerminating = this.context.isTerminating();
+  let isTerminating = this.context.isTerminating();
   console.log('ability state :' + isTerminating);
   ```
\ No newline at end of file
diff --git a/zh-cn/application-dev/reference/apis/js-apis-ability-featureAbility.md b/zh-cn/application-dev/reference/apis/js-apis-ability-featureAbility.md
index 5f4b00d60a2e22c3ff7ffceefa2719e58399f683..888f7536074351fc4314d25d7f6ee7c6b4462be7 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-ability-featureAbility.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-ability-featureAbility.md
@@ -139,7 +139,7 @@ acquireDataAbilityHelper(uri: string): DataAbilityHelper
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var dataAbilityHelper = featureAbility.acquireDataAbilityHelper(
+let dataAbilityHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 ```
@@ -148,7 +148,10 @@ var dataAbilityHelper = featureAbility.acquireDataAbilityHelper(
 
 startAbilityForResult(parameter: StartAbilityParameter, callback: AsyncCallback\<AbilityResult>): void
 
-启动一个Ability。Ability被启动后，正常情况下可通过调用[terminateSelfWithResult](#featureabilityterminateselfwithresult7)接口使之终止并且返回结果给调用者。异常情况下比如杀死Ability会返回异常信息给调用者（callback形式）。
+启动一个Ability。Ability被启动后，有如下情况(callback形式):
+ - 正常情况下可通过调用[terminateSelfWithResult](#featureabilityterminateselfwithresult7)接口使之终止并且返回结果给调用方。
+ - 异常情况下比如杀死Ability会返回异常信息给调用方, 异常信息中resultCode为-1。
+ - 如果被启动的Ability模式是单实例模式, 不同应用多次调用该接口启动这个Ability，当这个Ability调用[terminateSelfWithResult](#featureabilityterminateselfwithresult7)接口使之终止时，只将正常结果返回给最后一个调用方, 其它调用方返回异常信息, 异常信息中resultCode为-1。
 
 使用规则：
  - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
@@ -194,7 +197,10 @@ featureAbility.startAbilityForResult(
 
 startAbilityForResult(parameter: StartAbilityParameter): Promise\<AbilityResult>
 
-启动一个Ability。Ability被启动后，正常情况下可通过调用[terminateSelfWithResult](#featureabilityterminateselfwithresult7)接口使之终止并且返回结果给调用者。异常情况下比如杀死Ability会返回异常信息给调用者（Promise形式）。
+启动一个Ability。Ability被启动后，有如下情况(Promise形式):
+ - 正常情况下可通过调用[terminateSelfWithResult](#featureabilityterminateselfwithresult7)接口使之终止并且返回结果给调用方。
+ - 异常情况下比如杀死Ability会返回异常信息给调用方, 异常信息中resultCode为-1。
+ - 如果被启动的Ability模式是单实例模式, 不同应用多次调用该接口启动这个Ability，当这个Ability调用[terminateSelfWithResult](#featureabilityterminateselfwithresult7)接口使之终止时，只将正常结果返回给最后一个调用方, 其它调用方返回异常信息, 异常信息中resultCode为-1。
 
 使用规则：
  - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
@@ -469,7 +475,7 @@ getContext(): Context
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext()
+let context = featureAbility.getContext()
 context.getBundleName((err, data) => {
     console.info("getBundleName err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -558,7 +564,7 @@ function onDisconnectCallback(element){
 function onFailedCallback(code){
     console.log('featureAbilityTest ConnectAbility onFailed errCode : ' + code)
 }
-var connectId = featureAbility.connectAbility(
+let connectId = featureAbility.connectAbility(
     {
         deviceId: "",
         bundleName: "com.ix.ServiceAbility",
@@ -601,7 +607,7 @@ function onDisconnectCallback(element){
 function onFailedCallback(code){
     console.log('featureAbilityTest ConnectAbility onFailed errCode : ' + code)
 }
-var connectId = featureAbility.connectAbility(
+let connectId = featureAbility.connectAbility(
     {
         bundleName: "com.ix.ServiceAbility",
         abilityName: "com.ix.ServiceAbility.ServiceAbilityA",
@@ -653,7 +659,7 @@ function onDisconnectCallback(element){
 function onFailedCallback(code){
     console.log('featureAbilityTest ConnectAbility onFailed errCode : ' + code)
 }
-var connectId = featureAbility.connectAbility(
+let connectId = featureAbility.connectAbility(
     {
         bundleName: "com.ix.ServiceAbility",
         abilityName: "com.ix.ServiceAbility.ServiceAbilityA",
diff --git a/zh-cn/application-dev/reference/apis/js-apis-ability-particleAbility.md b/zh-cn/application-dev/reference/apis/js-apis-ability-particleAbility.md
index c6dab933e02f7dcb50eb65198611b3a64b6368c1..ff2c0379e3a934a26ba54e8da63f77b240540fef 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-ability-particleAbility.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-ability-particleAbility.md
@@ -190,7 +190,7 @@ acquireDataAbilityHelper(uri: string): DataAbilityHelper
 ```ts
 import particleAbility from '@ohos.ability.particleAbility'
 
-var uri = "";
+let uri = "";
 particleAbility.acquireDataAbilityHelper(uri)
 ```
 
@@ -416,7 +416,7 @@ function onFailedCallback(code) {
     console.log('particleAbilityTest ConnectAbility onFailed errCode : ' + code)
 }
 
-var connId = particleAbility.connectAbility(
+let connId = particleAbility.connectAbility(
     {
         bundleName: "com.ix.ServiceAbility",
         abilityName: "ServiceAbilityA",
@@ -467,7 +467,7 @@ function onFailedCallback(code) {
     console.log('particleAbilityTest ConnectAbility onFailed errCode : ' + code)
 }
 
-var connId = particleAbility.connectAbility(
+let connId = particleAbility.connectAbility(
     {
         bundleName: "com.ix.ServiceAbility",
         abilityName: "ServiceAbilityA",
@@ -518,7 +518,7 @@ function onFailedCallback(code) {
     console.log('particleAbilityTest ConnectAbility onFailed errCode : ' + code)
 }
 
-var connId = particleAbility.connectAbility(
+let connId = particleAbility.connectAbility(
     {
         bundleName: "com.ix.ServiceAbility",
         abilityName: "ServiceAbilityA",
diff --git a/zh-cn/application-dev/reference/apis/js-apis-app-ability-environmentCallback.md b/zh-cn/application-dev/reference/apis/js-apis-app-ability-environmentCallback.md
index cddc137417a2316d1ad26f022b973dfbc3037081..047bbb974f205611b317f4af60e27d96647dd5d4 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-app-ability-environmentCallback.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-app-ability-environmentCallback.md
@@ -35,7 +35,7 @@ onConfigurationUpdated(config: Configuration): void;
   ```ts
 import Ability from "@ohos.application.Ability";
 
-var callbackId;
+let callbackId;
 
 export default class MyAbility extends Ability {
     onCreate() {
diff --git a/zh-cn/application-dev/reference/apis/js-apis-app-ability-errorManager.md b/zh-cn/application-dev/reference/apis/js-apis-app-ability-errorManager.md
index d7dddb5e0c007f0ab09f397b9788284803dfb73c..747f5901d306b6157976639d6d5dc5d29b715b49 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-app-ability-errorManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-app-ability-errorManager.md
@@ -29,7 +29,7 @@ on(type: "error", observer: ErrorObserver): number;
 **示例：**
     
 ```js
-var observer = {
+let observer = {
     onUnhandledException(errorMsg) {
         console.log('onUnhandledException, errorMsg: ', errorMsg)
     }
@@ -60,7 +60,7 @@ off(type: "error", observerId: number,  callback: AsyncCallback\<void>): void;
 **示例：**
     
 ```js
-var observerId = 100;
+let observerId = 100;
 
 function unregisterErrorObserverCallback(err) {
     if (err) {
@@ -98,7 +98,7 @@ off(type: "error", observerId: number): Promise\<void>;
 **示例：**
     
 ```js
-var observerId = 100;
+let observerId = 100;
 try {
     errorManager.off("error", observerId)
         .then((data) => {
diff --git a/zh-cn/application-dev/reference/apis/js-apis-app-ability-missionManager.md b/zh-cn/application-dev/reference/apis/js-apis-app-ability-missionManager.md
index 5ffbebe7a63d4b4ac1b51dd1bcb81cbe66931696..030e37ff8c1e33875c5766561171ae9a025c5567 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-app-ability-missionManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-app-ability-missionManager.md
@@ -43,7 +43,7 @@ on(type:"mission", listener: MissionListener): number;
 **示例：**
 
 ```ts
-  var listener = {
+  let listener = {
       onMissionCreated: function (mission) {console.log("--------onMissionCreated-------")},
       onMissionDestroyed: function (mission) {console.log("--------onMissionDestroyed-------")},
       onMissionSnapshotChanged: function (mission) {console.log("--------onMissionSnapshotChanged-------")},
@@ -53,7 +53,7 @@ on(type:"mission", listener: MissionListener): number;
   };
   console.log("registerMissionListener")
   try {
-    var listenerid = missionManager.on("mission", listener);
+    let listenerid = missionManager.on("mission", listener);
   } catch (paramError) {
     console.log("error: " + paramError.code + ", " + paramError.message);
   }
@@ -82,7 +82,7 @@ off(type: "mission", listenerId: number, callback: AsyncCallback&lt;void&gt;): v
 **示例：**
 
 ```ts
-  var listener = {
+  let listener = {
       onMissionCreated: function (mission) {console.log("--------onMissionCreated-------")},
       onMissionDestroyed: function (mission) {console.log("--------onMissionDestroyed-------")},
       onMissionSnapshotChanged: function (mission) {console.log("--------onMissionSnapshotChanged-------")},
@@ -92,7 +92,7 @@ off(type: "mission", listenerId: number, callback: AsyncCallback&lt;void&gt;): v
   };
   console.log("registerMissionListener")
   try {
-    var listenerid = missionManager.registerMissionListener(listener);
+    let listenerid = missionManager.registerMissionListener(listener);
 
     missionManager.unregisterMissionListener(listenerid, (error) => {
       console.log("unregisterMissionListener");
@@ -130,7 +130,7 @@ off(type: "mission", listenerId: number): Promise&lt;void&gt;;
 **示例：**
 
 ```ts
-  var listener = {
+  let listener = {
       onMissionCreated: function (mission) {console.log("--------onMissionCreated-------")},
       onMissionDestroyed: function (mission) {console.log("--------onMissionDestroyed-------")},
       onMissionSnapshotChanged: function (mission) {console.log("--------onMissionSnapshotChanged-------")},
@@ -140,7 +140,7 @@ off(type: "mission", listenerId: number): Promise&lt;void&gt;;
   };
   console.log("registerMissionListener")
   try {
-  var listenerid = missionManager.registerMissionListener(listener);
+  let listenerid = missionManager.registerMissionListener(listener);
 
     missionManager.unregisterMissionListener(listenerid).catch(function (err) {
       console.log(err);
@@ -177,7 +177,7 @@ getMissionInfo(deviceId: string, missionId: number, callback: AsyncCallback&lt;M
   import missionManager from '@ohos.app.ability.missionManager'
 
   try {
-    var allMissions=missionManager.getMissionInfos("",10).catch(function(err){console.log(err);});
+    let allMissions=missionManager.getMissionInfos("",10).catch(function(err){console.log(err);});
       missionManager.getMissionInfo("", allMissions[0].missionId, (error, mission) => {
         console.log("getMissionInfo is called, error.code = " + error.code)
         console.log("mission.missionId = " + mission.missionId);
@@ -224,7 +224,7 @@ getMissionInfo(deviceId: string, missionId: number): Promise&lt;MissionInfo&gt;;
   import missionManager from '@ohos.app.ability.missionManager'
 
   try {
-    var mission = missionManager.getMissionInfo("", 10).catch(function (err){
+    let mission = missionManager.getMissionInfo("", 10).catch(function (err){
       console.log(err);
     });
   } catch (paramError) {
@@ -301,7 +301,7 @@ getMissionInfos(deviceId: string, numMax: number): Promise&lt;Array&lt;MissionIn
   import missionManager from '@ohos.app.ability.missionManager'
 
   try {
-    var allMissions = missionManager.getMissionInfos("", 10).catch(function (err){
+    let allMissions = missionManager.getMissionInfos("", 10).catch(function (err){
       console.log(err);
     });
   } catch (paramError) {
@@ -340,7 +340,7 @@ getMissionSnapShot(deviceId: string, missionId: number, callback: AsyncCallback&
       console.log("getMissionInfos is called, error.code = " + error.code);
       console.log("size = " + missions.length);
       console.log("missions = " + JSON.stringify(missions));
-      var id = missions[0].missionId;
+      let id = missions[0].missionId;
 
       missionManager.getMissionSnapShot("", id, (error, snapshot) => {
   	    console.log("getMissionSnapShot is called, error.code = " + error.code);
@@ -384,15 +384,15 @@ getMissionSnapShot(deviceId: string, missionId: number): Promise&lt;MissionSnaps
   import missionManager from '@ohos.app.ability.missionManager'
 
   try {
-    var allMissions;
+    let allMissions;
     missionManager.getMissionInfos("",10).then(function(res){
       allMissions=res;
       }).catch(function(err){console.log(err);});
       console.log("size = " + allMissions.length);
       console.log("missions = " + JSON.stringify(allMissions));
-      var id = allMissions[0].missionId;
+      let id = allMissions[0].missionId;
 
-      var snapshot = missionManager.getMissionSnapShot("", id).catch(function (err){
+      let snapshot = missionManager.getMissionSnapShot("", id).catch(function (err){
         console.log(err);
       });
   } catch (paramError) {
@@ -430,7 +430,7 @@ getLowResolutionMissionSnapShot(deviceId: string, missionId: number, callback: A
       console.log("getMissionInfos is called, error.code = " + error.code);
       console.log("size = " + missions.length);
       console.log("missions = " + JSON.stringify(missions));
-      var id = missions[0].missionId;
+      let id = missions[0].missionId;
 
       missionManager.getLowResolutionMissionSnapShot("", id, (error, snapshot) => {
   	    console.log("getLowResolutionMissionSnapShot is called, error.code = " + error.code);
@@ -474,15 +474,15 @@ getLowResolutionMissionSnapShot(deviceId: string, missionId: number): Promise\<M
   import missionManager from '@ohos.app.ability.missionManager'
 
   try {
-    var allMissions;
+    let allMissions;
     missionManager.getMissionInfos("",10).then(function(res){
       allMissions=res;
       }).catch(function(err){console.log(err);});
       console.log("size = " + allMissions.length);
       console.log("missions = " + JSON.stringify(allMissions));
-      var id = allMissions[0].missionId;
+      let id = allMissions[0].missionId;
 
-      var snapshot = missionManager.getLowResolutionMissionSnapShot("", id).catch(function (err){
+      let snapshot = missionManager.getLowResolutionMissionSnapShot("", id).catch(function (err){
         console.log(err);
       });
   } catch (paramError) {
@@ -520,7 +520,7 @@ lockMission(missionId: number, callback: AsyncCallback&lt;void&gt;): void;
       console.log("getMissionInfos is called, error.code = " + error.code);
       console.log("size = " + missions.length);
       console.log("missions = " + JSON.stringify(missions));
-      var id = missions[0].missionId;
+      let id = missions[0].missionId;
 
       missionManager.lockMission(id).then(() => {
   	    console.log("lockMission is called ");
@@ -562,13 +562,13 @@ lockMission(missionId: number): Promise&lt;void&gt;;
   import missionManager from '@ohos.app.ability.missionManager'
   
   try {
-    var allMissions;
+    let allMissions;
     missionManager.getMissionInfos("",10).then(function(res){
       allMissions=res;
     }).catch(function(err){console.log(err);});
     console.log("size = " + allMissions.length);
     console.log("missions = " + JSON.stringify(allMissions));
-    var id = allMissions[0].missionId;
+    let id = allMissions[0].missionId;
 
     missionManager.lockMission(id).catch(function (err){
       console.log(err);
@@ -608,7 +608,7 @@ unlockMission(missionId: number, callback: AsyncCallback&lt;void&gt;): void;
       console.log("getMissionInfos is called, error.code = " + error.code);
       console.log("size = " + missions.length);
       console.log("missions = " + JSON.stringify(missions));
-      var id = missions[0].missionId;
+      let id = missions[0].missionId;
 
       missionManager.unlockMission(id).then(() => {
   	    console.log("unlockMission is called ");
@@ -650,13 +650,13 @@ unlockMission(missionId: number): Promise&lt;void&gt;;
   import missionManager from '@ohos.app.ability.missionManager'
 
   try {
-    var allMissions;
+    let allMissions;
     missionManager.getMissionInfos("",10).then(function(res){
       allMissions=res;
     }).catch(function(err){console.log(err);});
     console.log("size = " + allMissions.length);
     console.log("missions = " + JSON.stringify(allMissions));
-    var id = allMissions[0].missionId;
+    let id = allMissions[0].missionId;
 
     missionManager.lockMission(id).catch(function (err){
       console.log(err);
@@ -699,7 +699,7 @@ clearMission(missionId: number, callback: AsyncCallback&lt;void&gt;): void;
       console.log("getMissionInfos is called, error.code = " + error.code);
       console.log("size = " + missions.length);
       console.log("missions = " + JSON.stringify(missions));
-      var id = missions[0].missionId;
+      let id = missions[0].missionId;
 
       missionManager.clearMission(id).then(() => {
   	    console.log("clearMission is called ");
@@ -741,13 +741,13 @@ clearMission(missionId: number): Promise&lt;void&gt;;
   import missionManager from '@ohos.app.ability.missionManager'
 
   try {
-    var allMissions;
+    let allMissions;
     missionManager.getMissionInfos("",10).then(function(res){
       allMissions=res;
     }).catch(function(err){console.log(err);});
     console.log("size = " + allMissions.length);
     console.log("missions = " + JSON.stringify(allMissions));
-    var id = allMissions[0].missionId;
+    let id = allMissions[0].missionId;
 
     missionManager.clearMission(id).catch(function (err){
       console.log(err);
@@ -838,7 +838,7 @@ moveMissionToFront(missionId: number, callback: AsyncCallback&lt;void&gt;): void
       console.log("getMissionInfos is called, error.code = " + error.code);
       console.log("size = " + missions.length);
       console.log("missions = " + JSON.stringify(missions));
-      var id = missions[0].missionId;
+      let id = missions[0].missionId;
 
       missionManager.moveMissionToFront(id).then(() => {
   	    console.log("moveMissionToFront is called ");
@@ -880,7 +880,7 @@ moveMissionToFront(missionId: number, options: StartOptions, callback: AsyncCall
       console.log("getMissionInfos is called, error.code = " + error.code);
       console.log("size = " + missions.length);
       console.log("missions = " + JSON.stringify(missions));
-      var id = missions[0].missionId;
+      let id = missions[0].missionId;
 
       missionManager.moveMissionToFront(id,{windowMode : 101}).then(() => {
   	    console.log("moveMissionToFront is called ");
@@ -923,13 +923,13 @@ moveMissionToFront(missionId: number, options?: StartOptions): Promise&lt;void&g
   import missionManager from '@ohos.app.ability.missionManager'
 
   try {
-    var allMissions;
+    let allMissions;
     missionManager.getMissionInfos("",10).then(function(res){
       allMissions=res;
     }).catch(function(err){console.log(err);});
     console.log("size = " + allMissions.length);
     console.log("missions = " + JSON.stringify(allMissions));
-    var id = allMissions[0].missionId;
+    let id = allMissions[0].missionId;
 
     missionManager.moveMissionToFront(id).catch(function (err){
       console.log(err);
diff --git a/zh-cn/application-dev/reference/apis/js-apis-app-ability-uiAbility.md b/zh-cn/application-dev/reference/apis/js-apis-app-ability-uiAbility.md
index 866c3e20e18fb070c827f77598c222896294581e..1a2866d05b592418dd2016e8f206ebeb77059533 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-app-ability-uiAbility.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-app-ability-uiAbility.md
@@ -361,8 +361,8 @@ call(method: string, data: rpc.Sequenceable): Promise&lt;void&gt;;
       return true;
     }
   };
-  var method = 'call_Function'; // 约定的通知消息字符串
-  var caller;
+  let method = 'call_Function'; // 约定的通知消息字符串
+  let caller;
   export default class MainAbility extends Ability {
     onWindowStageCreate(windowStage) {
       this.context.startAbilityByCall({
@@ -442,8 +442,8 @@ callWithResult(method: string, data: rpc.Sequenceable): Promise&lt;rpc.MessagePa
       return true;
     }
   };
-  var method = 'call_Function';
-  var caller;
+  let method = 'call_Function';
+  let caller;
   export default class MainAbility extends Ability {
     onWindowStageCreate(windowStage) {
       this.context.startAbilityByCall({
@@ -493,7 +493,7 @@ release(): void;
     
   ```ts
   import Ability from '@ohos.app.ability.UIAbility';
-  var caller;
+  let caller;
   export default class MainAbility extends Ability {
     onWindowStageCreate(windowStage) {
       this.context.startAbilityByCall({
@@ -534,7 +534,7 @@ release(): void;
     
   ```ts
   import Ability from '@ohos.application.Ability';
-  var caller;
+  let caller;
   export default class MainAbility extends Ability {
     onWindowStageCreate(windowStage) {
       this.context.startAbilityByCall({
@@ -585,7 +585,7 @@ release(): void;
     
   ```ts
   import Ability from '@ohos.app.ability.UIAbility';
-  var caller;
+  let caller;
   export default class MainAbility extends Ability {
     onWindowStageCreate(windowStage) {
       this.context.startAbilityByCall({
@@ -635,7 +635,7 @@ off(type: "release", callback: OnReleaseCallback): void;
 **示例：**
     
   ```ts
-  var caller;
+  let caller;
   export default class MainUIAbility extends UIAbility {
     onWindowStageCreate(windowStage) {
       this.context.startAbilityByCall({
@@ -686,7 +686,7 @@ off(type: "release"): void;
 **示例：**
     
   ```ts
-  var caller;
+  let caller;
   export default class MainUIAbility extends UIAbility {
     onWindowStageCreate(windowStage) {
       this.context.startAbilityByCall({
@@ -764,7 +764,7 @@ on(method: string, callback: CalleeCallback): void;
           return true;
       }
   };
-  var method = 'call_Function';
+  let method = 'call_Function';
   function funcCallBack(pdata) {
       console.log('Callee funcCallBack is called ' + pdata);
       let msg = new MyMessageAble("test", "");
@@ -810,7 +810,7 @@ off(method: string): void;
     
   ```ts
   import Ability from '@ohos.app.ability.UIAbility';
-  var method = 'call_Function';
+  let method = 'call_Function';
   export default class MainAbility extends Ability {
     onCreate(want, launchParam) {
       console.log('Callee onCreate is called');
diff --git a/zh-cn/application-dev/reference/apis/js-apis-application-ability.md b/zh-cn/application-dev/reference/apis/js-apis-application-ability.md
index df08aed5ecb0c7e8092cf43f265c49f391d2250b..ba7425428945eb12aada1253c191a19330591d3e 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-application-ability.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-application-ability.md
@@ -326,7 +326,7 @@ onSaveState(reason: AbilityConstant.StateType, wantParam : {[key: string]: any})
 
   | 参数名 | 类型 | 必填 | 说明 |
   | -------- | -------- | -------- | -------- |
-  | reason | [AbilityConstant.StateType](js-apis-application-abilityConstant.md#abilityconstantstatetype) | 是 | 回调保存状态的原因。 |
+  | reason | [AbilityConstant.StateType](js-apis-app-ability-abilityConstant.md#abilityconstantstatetype) | 是 | 回调保存状态的原因。 |
   | wantParam | {[key:&nbsp;string]:&nbsp;any} | 是 | want相关参数。 |
 
 **返回值：**
@@ -411,8 +411,8 @@ call(method: string, data: rpc.Sequenceable): Promise&lt;void&gt;;
       return true;
     }
   };
-  var method = 'call_Function'; // 约定的通知消息字符串
-  var caller;
+  let method = 'call_Function'; // 约定的通知消息字符串
+  let caller;
   export default class MainAbility extends Ability {
     onWindowStageCreate(windowStage) {
       this.context.startAbilityByCall({
@@ -495,8 +495,8 @@ callWithResult(method: string, data: rpc.Sequenceable): Promise&lt;rpc.MessagePa
       return true;
     }
   };
-  var method = 'call_Function';
-  var caller;
+  let method = 'call_Function';
+  let caller;
   export default class MainAbility extends Ability {
     onWindowStageCreate(windowStage) {
       this.context.startAbilityByCall({
@@ -546,7 +546,7 @@ release(): void;
     
   ```ts
   import Ability from '@ohos.application.Ability';
-  var caller;
+  let caller;
   export default class MainAbility extends Ability {
     onWindowStageCreate(windowStage) {
       this.context.startAbilityByCall({
@@ -587,7 +587,7 @@ release(): void;
     
   ```ts
   import Ability from '@ohos.application.Ability';
-  var caller;
+  let caller;
   export default class MainAbility extends Ability {
     onWindowStageCreate(windowStage) {
       this.context.startAbilityByCall({
@@ -665,7 +665,7 @@ on(method: string, callback: CalleeCallBack): void;
           return true;
       }
   };
-  var method = 'call_Function';
+  let method = 'call_Function';
   function funcCallBack(pdata) {
       console.log('Callee funcCallBack is called ' + pdata);
       let msg = new MyMessageAble("test", "");
@@ -712,7 +712,7 @@ off(method: string): void;
     
   ```ts
   import Ability from '@ohos.application.Ability';
-  var method = 'call_Function';
+  let method = 'call_Function';
   export default class MainAbility extends Ability {
     onCreate(want, launchParam) {
       console.log('Callee onCreate is called');
diff --git a/zh-cn/application-dev/reference/apis/js-apis-application-abilityDelegatorRegistry.md b/zh-cn/application-dev/reference/apis/js-apis-application-abilityDelegatorRegistry.md
index d61c81f1e9a5f3bb9c401506830ebd55f1a706d3..1d5a6b763f438966e57aa075085f47a6aa2b433e 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-application-abilityDelegatorRegistry.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-application-abilityDelegatorRegistry.md
@@ -43,7 +43,7 @@ getAbilityDelegator(): AbilityDelegator
 **示例：**
 
 ```ts
-var abilityDelegator;
+let abilityDelegator;
 
 abilityDelegator = AbilityDelegatorRegistry.getAbilityDelegator();
 ```
@@ -65,7 +65,7 @@ getArguments(): AbilityDelegatorArgs
 **示例：**
 
 ```ts
-var args = AbilityDelegatorRegistry.getArguments();
+let args = AbilityDelegatorRegistry.getArguments();
 console.info("getArguments bundleName:" + args.bundleName);
 console.info("getArguments testCaseNames:" + args.testCaseNames);
 console.info("getArguments testRunnerClassName:" + args.testRunnerClassName);
diff --git a/zh-cn/application-dev/reference/apis/js-apis-application-abilityLifecycleCallback.md b/zh-cn/application-dev/reference/apis/js-apis-application-abilityLifecycleCallback.md
index a1edb414999f831aea317c75d7c4d0c2b1504630..ed03531bf9656276c822294678dac2f383978897 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-application-abilityLifecycleCallback.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-application-abilityLifecycleCallback.md
@@ -159,7 +159,7 @@ onAbilityContinue(ability: Ability): void;
 ```ts
 import AbilityStage from "@ohos.application.AbilityStage";
 
-var lifecycleid;
+let lifecycleid;
 
 export default class MyAbilityStage extends AbilityStage {
     onCreate() {
@@ -210,4 +210,5 @@ export default class MyAbilityStage extends AbilityStage {
         });
     }
 }
-```
\ No newline at end of file
+```
+<!--no_check-->
\ No newline at end of file
diff --git a/zh-cn/application-dev/reference/apis/js-apis-application-abilityManager.md b/zh-cn/application-dev/reference/apis/js-apis-application-abilityManager.md
index 717f2bdcb2fa2e29dea7912d42b843e971681a43..cfd957798884eb47998a9dca6d1a3bebd0f618f3 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-application-abilityManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-application-abilityManager.md
@@ -51,7 +51,7 @@ updateConfiguration(config: Configuration, callback: AsyncCallback\<void>): void
 ```ts
 import abilitymanager from '@ohos.application.abilityManager';
 
-var config = {
+let config = {
   language: 'chinese' 
 }
 
@@ -87,7 +87,7 @@ updateConfiguration(config: Configuration): Promise\<void>
 ```ts
 import abilitymanager from '@ohos.application.abilityManager';
 
-var config = {
+let config = {
   language: 'chinese' 
 }
 
diff --git a/zh-cn/application-dev/reference/apis/js-apis-application-appManager.md b/zh-cn/application-dev/reference/apis/js-apis-application-appManager.md
index bfa157e2dc581a53e783b71b32f5215206e2d61f..b90614f6931bb50cc4fe1057ed3e51f98201a20c 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-application-appManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-application-appManager.md
@@ -282,7 +282,7 @@ registerApplicationStateObserver(observer: ApplicationStateObserver): number;
 **示例：**
     
   ```ts
-  var applicationStateObserver = {
+  let applicationStateObserver = {
     onForegroundApplicationChanged(appStateData) {
         console.log('------------ onForegroundApplicationChanged -----------', appStateData);
     },
@@ -325,7 +325,7 @@ registerApplicationStateObserver(observer: ApplicationStateObserver, bundleNameL
 **示例：**
     
   ```ts
-  var applicationStateObserver = {
+  let applicationStateObserver = {
     onForegroundApplicationChanged(appStateData) {
         console.log('------------ onForegroundApplicationChanged -----------', appStateData);
     },
@@ -342,7 +342,7 @@ registerApplicationStateObserver(observer: ApplicationStateObserver, bundleNameL
         console.log('------------ onProcessStateChanged -----------', processData);
     }
   }
-  var bundleNameList = ['bundleName1', 'bundleName2'];
+  let bundleNameList = ['bundleName1', 'bundleName2'];
   const observerCode = app.registerApplicationStateObserver(applicationStateObserver, bundleNameList);
   console.log('-------- observerCode: ---------', observerCode);
   ```
@@ -368,7 +368,7 @@ unregisterApplicationStateObserver(observerId: number,  callback: AsyncCallback\
 **示例：**
     
   ```ts
-  var observerId = 100;
+  let observerId = 100;
 
   function unregisterApplicationStateObserverCallback(err) {
     if (err) {
@@ -405,7 +405,7 @@ unregisterApplicationStateObserver(observerId: number): Promise\<void>;
 **示例：**
     
   ```ts
-  var observerId = 100;
+  let observerId = 100;
 
   app.unregisterApplicationStateObserver(observerId)
   .then((data) => {
@@ -499,8 +499,8 @@ killProcessWithAccount(bundleName: string, accountId: number): Promise\<void\>
 **示例：**
 
 ```ts
-var bundleName = 'bundleName';
-var accountId = 0;
+let bundleName = 'bundleName';
+let accountId = 0;
 app.killProcessWithAccount(bundleName, accountId)
    .then((data) => {
        console.log('------------ killProcessWithAccount success ------------', data);
@@ -534,8 +534,8 @@ killProcessWithAccount(bundleName: string, accountId: number, callback: AsyncCal
 **示例：**
 
 ```ts
-var bundleName = 'bundleName';
-var accountId = 0;
+let bundleName = 'bundleName';
+let accountId = 0;
 function killProcessWithAccountCallback(err, data) {
    if (err) {
        console.log('------------- killProcessWithAccountCallback fail, err: --------------', err);
@@ -568,7 +568,7 @@ killProcessesByBundleName(bundleName: string, callback: AsyncCallback\<void>);
 **示例：**
     
   ```ts
-  var bundleName = 'bundleName';
+  let bundleName = 'bundleName';
   function killProcessesByBundleNameCallback(err, data) {
     if (err) {
         console.log('------------- killProcessesByBundleNameCallback fail, err: --------------', err);
@@ -606,7 +606,7 @@ killProcessesByBundleName(bundleName: string): Promise\<void>;
 **示例：**
     
   ```ts
-  var bundleName = 'bundleName';
+  let bundleName = 'bundleName';
   app.killProcessesByBundleName(bundleName)
     .then((data) => {
         console.log('------------ killProcessesByBundleName success ------------', data);
@@ -638,7 +638,7 @@ clearUpApplicationData(bundleName: string, callback: AsyncCallback\<void>);
 **示例：**
     
   ```ts
-  var bundleName = 'bundleName';
+  let bundleName = 'bundleName';
   function clearUpApplicationDataCallback(err, data) {
     if (err) {
         console.log('------------- clearUpApplicationDataCallback fail, err: --------------', err);
@@ -676,7 +676,7 @@ clearUpApplicationData(bundleName: string): Promise\<void>;
 **示例：**
     
   ```ts
-  var bundleName = 'bundleName';
+  let bundleName = 'bundleName';
   app.clearUpApplicationData(bundleName)
     .then((data) => {
         console.log('------------ clearUpApplicationData success ------------', data);
diff --git a/zh-cn/application-dev/reference/apis/js-apis-application-environmentCallback.md b/zh-cn/application-dev/reference/apis/js-apis-application-environmentCallback.md
index e0d8ab2476362df2412df2164b073177f9a23a78..00483e42a205167dcd62722f40c576a4e745e276 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-application-environmentCallback.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-application-environmentCallback.md
@@ -35,7 +35,7 @@ onConfigurationUpdated(config: Configuration): void;
   ```ts
 import Ability from "@ohos.application.Ability";
 
-var callbackId;
+let callbackId;
 
 export default class MyAbility extends Ability {
     onCreate() {
diff --git a/zh-cn/application-dev/reference/apis/js-apis-application-errorManager.md b/zh-cn/application-dev/reference/apis/js-apis-application-errorManager.md
index d5674d410da3e50dc081b098a2a2903c045e7f75..f70378719e985d1f44f1c963b9cc83e773ffb9de 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-application-errorManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-application-errorManager.md
@@ -28,7 +28,7 @@ registerErrorObserver(observer: ErrorObserver): number;
 **示例：**
     
 ```ts
-var observer = {
+let observer = {
     onUnhandledException(errorMsg) {
         console.log('onUnhandledException, errorMsg: ', errorMsg)
     }
@@ -54,7 +54,7 @@ unregisterErrorObserver(observerId: number,  callback: AsyncCallback\<void>): vo
 **示例：**
     
 ```ts
-var observerId = 100;
+let observerId = 100;
 
 function unregisterErrorObserverCallback(err) {
     if (err) {
@@ -88,7 +88,7 @@ unregisterErrorObserver(observerId: number): Promise\<void>;
 **示例：**
     
 ```ts
-var observerId = 100;
+let observerId = 100;
 errorManager.unregisterErrorObserver(observerId)
 .then((data) => {
     console.log('----------- unregisterErrorObserver success ----------', data);
diff --git a/zh-cn/application-dev/reference/apis/js-apis-application-missionManager.md b/zh-cn/application-dev/reference/apis/js-apis-application-missionManager.md
index c95a76feec5ab019a2411ba88f0db2ce2eaf66d4..39bf6bb3888af54ec793b06425ab3334beda3426 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-application-missionManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-application-missionManager.md
@@ -43,7 +43,7 @@ registerMissionListener(listener: MissionListener): number;
 **示例：**
 
 ```ts
-var listener = {
+let listener = {
     onMissionCreated: function (mission) {console.log("--------onMissionCreated-------")},
     onMissionDestroyed: function (mission) {console.log("--------onMissionDestroyed-------")},
     onMissionSnapshotChanged: function (mission) {console.log("--------onMissionSnapshotChanged-------")},
@@ -53,7 +53,7 @@ var listener = {
     onMissionLabelUpdated: function (mission) {console.log("--------onMissionLabelUpdated-------")}
 };
 console.log("registerMissionListener")
-var listenerid = missionManager.registerMissionListener(listener);
+let listenerid = missionManager.registerMissionListener(listener);
 ```
 
 
@@ -79,7 +79,7 @@ unregisterMissionListener(listenerId: number, callback: AsyncCallback&lt;void&gt
 **示例：**
 
 ```ts
-  var listener = {
+  let listener = {
       onMissionCreated: function (mission) {console.log("--------onMissionCreated-------")},
       onMissionDestroyed: function (mission) {console.log("--------onMissionDestroyed-------")},
       onMissionSnapshotChanged: function (mission) {console.log("--------onMissionSnapshotChanged-------")},
@@ -89,7 +89,7 @@ unregisterMissionListener(listenerId: number, callback: AsyncCallback&lt;void&gt
       onMissionLabelUpdated: function (mission) {console.log("--------onMissionLabelUpdated-------")}
   };
   console.log("registerMissionListener")
-  var listenerid = missionManager.registerMissionListener(listener);
+  let listenerid = missionManager.registerMissionListener(listener);
 
   missionManager.unregisterMissionListener(listenerid, (error) => {
       console.log("unregisterMissionListener");
@@ -124,7 +124,7 @@ unregisterMissionListener(listenerId: number): Promise&lt;void&gt;;
 **示例：**
 
 ```ts
-  var listener = {
+  let listener = {
       onMissionCreated: function (mission) {console.log("--------onMissionCreated-------")},
       onMissionDestroyed: function (mission) {console.log("--------onMissionDestroyed-------")},
       onMissionSnapshotChanged: function (mission) {console.log("--------onMissionSnapshotChanged-------")},
@@ -134,7 +134,7 @@ unregisterMissionListener(listenerId: number): Promise&lt;void&gt;;
       onMissionLabelUpdated: function (mission) {console.log("--------onMissionLabelUpdated-------")}
   };
   console.log("registerMissionListener")
-  var listenerid = missionManager.registerMissionListener(listener);
+  let listenerid = missionManager.registerMissionListener(listener);
 
   missionManager.unregisterMissionListener(listenerid).catch(function (err) {
       console.log(err);
@@ -167,7 +167,7 @@ getMissionInfo(deviceId: string, missionId: number, callback: AsyncCallback&lt;M
   ```ts
   import missionManager from '@ohos.application.missionManager'
 
-  var allMissions=missionManager.getMissionInfos("",10).catch(function(err){console.log(err);});
+  let allMissions=missionManager.getMissionInfos("",10).catch(function(err){console.log(err);});
       missionManager.getMissionInfo("", allMissions[0].missionId, (error, mission) => {
         console.log("getMissionInfo is called, error.code = " + error.code)
         console.log("mission.missionId = " + mission.missionId);
@@ -210,7 +210,7 @@ getMissionInfo(deviceId: string, missionId: number): Promise&lt;MissionInfo&gt;;
   ```ts
   import missionManager from '@ohos.application.missionManager'
 
-  var mission = missionManager.getMissionInfo("", 10).catch(function (err){
+  let mission = missionManager.getMissionInfo("", 10).catch(function (err){
       console.log(err);
   });
   ```
@@ -279,7 +279,7 @@ getMissionInfos(deviceId: string, numMax: number): Promise&lt;Array&lt;MissionIn
   ```ts
   import missionManager from '@ohos.application.missionManager'
 
-  var allMissions = missionManager.getMissionInfos("", 10).catch(function (err){
+  let allMissions = missionManager.getMissionInfos("", 10).catch(function (err){
       console.log(err);
   });
   ```
@@ -314,7 +314,7 @@ getMissionSnapShot(deviceId: string, missionId: number, callback: AsyncCallback&
     console.log("getMissionInfos is called, error.code = " + error.code);
     console.log("size = " + missions.length);
     console.log("missions = " + JSON.stringify(missions));
-    var id = missions[0].missionId;
+    let id = missions[0].missionId;
 
     missionManager.getMissionSnapShot("", id, (error, snapshot) => {
   	console.log("getMissionSnapShot is called, error.code = " + error.code);
@@ -354,15 +354,15 @@ getMissionSnapShot(deviceId: string, missionId: number): Promise&lt;MissionSnaps
   ```ts
   import missionManager from '@ohos.application.missionManager'
 
-  var allMissions;
+  let allMissions;
   missionManager.getMissionInfos("",10).then(function(res){
     allMissions=res;
     }).catch(function(err){console.log(err);});
     console.log("size = " + allMissions.length);
     console.log("missions = " + JSON.stringify(allMissions));
-    var id = allMissions[0].missionId;
+    let id = allMissions[0].missionId;
 
-    var snapshot = missionManager.getMissionSnapShot("", id).catch(function (err){
+    let snapshot = missionManager.getMissionSnapShot("", id).catch(function (err){
         console.log(err);
     });
   ```
@@ -396,7 +396,7 @@ getLowResolutionMissionSnapShot(deviceId: string, missionId: number, callback: A
     console.log("getMissionInfos is called, error.code = " + error.code);
     console.log("size = " + missions.length);
     console.log("missions = " + JSON.stringify(missions));
-    var id = missions[0].missionId;
+    let id = missions[0].missionId;
 
     missionManager.getLowResolutionMissionSnapShot("", id, (error, snapshot) => {
   	console.log("getLowResolutionMissionSnapShot is called, error.code = " + error.code);
@@ -436,15 +436,15 @@ getLowResolutionMissionSnapShot(deviceId: string, missionId: number): Promise\<M
   ```ts
   import missionManager from '@ohos.application.missionManager'
 
-  var allMissions;
+  let allMissions;
   missionManager.getMissionInfos("",10).then(function(res){
     allMissions=res;
     }).catch(function(err){console.log(err);});
     console.log("size = " + allMissions.length);
     console.log("missions = " + JSON.stringify(allMissions));
-    var id = allMissions[0].missionId;
+    let id = allMissions[0].missionId;
 
-    var snapshot = missionManager.getLowResolutionMissionSnapShot("", id).catch(function (err){
+    let snapshot = missionManager.getLowResolutionMissionSnapShot("", id).catch(function (err){
         console.log(err);
     });
   ```
@@ -478,7 +478,7 @@ lockMission(missionId: number, callback: AsyncCallback&lt;void&gt;): void;
     console.log("getMissionInfos is called, error.code = " + error.code);
     console.log("size = " + missions.length);
     console.log("missions = " + JSON.stringify(missions));
-    var id = missions[0].missionId;
+    let id = missions[0].missionId;
 
     missionManager.lockMission(id).then(() => {
   	console.log("lockMission is called ");
@@ -515,13 +515,13 @@ lockMission(missionId: number): Promise&lt;void&gt;;
 
   ```ts
   import missionManager from '@ohos.application.missionManager'
-  var allMissions;
+  let allMissions;
   missionManager.getMissionInfos("",10).then(function(res){
     allMissions=res;
   }).catch(function(err){console.log(err);});
   console.log("size = " + allMissions.length);
   console.log("missions = " + JSON.stringify(allMissions));
-  var id = allMissions[0].missionId;
+  let id = allMissions[0].missionId;
 
   missionManager.lockMission(id).catch(function (err){
       console.log(err);
@@ -557,7 +557,7 @@ unlockMission(missionId: number, callback: AsyncCallback&lt;void&gt;): void;
     console.log("getMissionInfos is called, error.code = " + error.code);
     console.log("size = " + missions.length);
     console.log("missions = " + JSON.stringify(missions));
-    var id = missions[0].missionId;
+    let id = missions[0].missionId;
 
     missionManager.unlockMission(id).then(() => {
   	console.log("unlockMission is called ");
@@ -595,13 +595,13 @@ unlockMission(missionId: number): Promise&lt;void&gt;;
   ```ts
   import missionManager from '@ohos.application.missionManager'
 
-  var allMissions;
+  let allMissions;
   missionManager.getMissionInfos("",10).then(function(res){
     allMissions=res;
   }).catch(function(err){console.log(err);});
   console.log("size = " + allMissions.length);
   console.log("missions = " + JSON.stringify(allMissions));
-  var id = allMissions[0].missionId;
+  let id = allMissions[0].missionId;
 
   missionManager.lockMission(id).catch(function (err){
       console.log(err);
@@ -640,7 +640,7 @@ clearMission(missionId: number, callback: AsyncCallback&lt;void&gt;): void;
     console.log("getMissionInfos is called, error.code = " + error.code);
     console.log("size = " + missions.length);
     console.log("missions = " + JSON.stringify(missions));
-    var id = missions[0].missionId;
+    let id = missions[0].missionId;
 
     missionManager.clearMission(id).then(() => {
   	console.log("clearMission is called ");
@@ -678,13 +678,13 @@ clearMission(missionId: number): Promise&lt;void&gt;;
   ```ts
   import missionManager from '@ohos.application.missionManager'
 
-  var allMissions;
+  let allMissions;
   missionManager.getMissionInfos("",10).then(function(res){
     allMissions=res;
   }).catch(function(err){console.log(err);});
   console.log("size = " + allMissions.length);
   console.log("missions = " + JSON.stringify(allMissions));
-  var id = allMissions[0].missionId;
+  let id = allMissions[0].missionId;
 
   missionManager.clearMission(id).catch(function (err){
     console.log(err);
@@ -771,7 +771,7 @@ moveMissionToFront(missionId: number, callback: AsyncCallback&lt;void&gt;): void
     console.log("getMissionInfos is called, error.code = " + error.code);
     console.log("size = " + missions.length);
     console.log("missions = " + JSON.stringify(missions));
-    var id = missions[0].missionId;
+    let id = missions[0].missionId;
 
     missionManager.moveMissionToFront(id).then(() => {
   	console.log("moveMissionToFront is called ");
@@ -797,7 +797,7 @@ moveMissionToFront(missionId: number, options: StartOptions, callback: AsyncCall
   | 参数名 | 类型 | 必填 | 说明 |
   | -------- | -------- | -------- | -------- |
   | missionId | number | 是 | 任务ID。 |
-  | options | [StartOptions](js-apis-application-startOptions.md) | 是 | 启动参数选项，用于指定任务切到前台时的窗口模式，设备ID等。 |
+  | options | [StartOptions](js-apis-app-ability-startOptions.md) | 是 | 启动参数选项，用于指定任务切到前台时的窗口模式，设备ID等。 |
   | callback | AsyncCallback&lt;void&gt; | 是 | 执行结果回调函数。 |
 
 **示例：**
@@ -809,7 +809,7 @@ moveMissionToFront(missionId: number, options: StartOptions, callback: AsyncCall
     console.log("getMissionInfos is called, error.code = " + error.code);
     console.log("size = " + missions.length);
     console.log("missions = " + JSON.stringify(missions));
-    var id = missions[0].missionId;
+    let id = missions[0].missionId;
 
     missionManager.moveMissionToFront(id,{windowMode : 101}).then(() => {
   	console.log("moveMissionToFront is called ");
@@ -835,7 +835,7 @@ moveMissionToFront(missionId: number, options?: StartOptions): Promise&lt;void&g
   | 参数名 | 类型 | 必填 | 说明 |
   | -------- | -------- | -------- | -------- |
   | missionId | number | 是 | 任务ID。 |
-  | options | [StartOptions](js-apis-application-startOptions.md) | 否 | 启动参数选项，用于指定任务切到前台时的窗口模式，设备ID等。 |
+  | options | [StartOptions](js-apis-app-ability-startOptions.md) | 否 | 启动参数选项，用于指定任务切到前台时的窗口模式，设备ID等。 |
 
 **返回值：**
 
@@ -848,13 +848,13 @@ moveMissionToFront(missionId: number, options?: StartOptions): Promise&lt;void&g
   ```ts
   import missionManager from '@ohos.application.missionManager'
 
-  var allMissions;
+  let allMissions;
   missionManager.getMissionInfos("",10).then(function(res){
     allMissions=res;
   }).catch(function(err){console.log(err);});
   console.log("size = " + allMissions.length);
   console.log("missions = " + JSON.stringify(allMissions));
-  var id = allMissions[0].missionId;
+  let id = allMissions[0].missionId;
 
   missionManager.moveMissionToFront(id).catch(function (err){
     console.log(err);
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inner-ability-dataAbilityHelper.md b/zh-cn/application-dev/reference/apis/js-apis-inner-ability-dataAbilityHelper.md
index 92c7a495dd0b9163bbb9d752ce39bad390848e65..82d495b626a03a28d0b2911fe44d573df0402fe1 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inner-ability-dataAbilityHelper.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inner-ability-dataAbilityHelper.md
@@ -35,10 +35,10 @@ openFile(uri: string, mode: string, callback: AsyncCallback\<number>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
-var mode = "rwt";
+let mode = "rwt";
 DAHelper.openFile("dataability:///com.example.DataAbility", mode, (err) => {
     console.info("==========================>Called=======================>");
 });
@@ -69,10 +69,10 @@ openFile(uri: string, mode: string): Promise\<number>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
-var mode = "rwt";
+let mode = "rwt";
 DAHelper.openFile("dataability:///com.example.DataAbility", mode).then((data) => {
 	console.info("==========================>openFileCallback=======================>");
 });
@@ -98,7 +98,7 @@ on(type: 'dataChange', uri: string, callback: AsyncCallback\<void>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var helper = featureAbility.acquireDataAbilityHelper(
+let helper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 function onChangeNotify() {
@@ -131,7 +131,7 @@ off(type: 'dataChange', uri: string, callback?: AsyncCallback\<void>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var helper = featureAbility.acquireDataAbilityHelper(
+let helper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 function onChangeNotify() {
@@ -167,7 +167,7 @@ getType(uri: string, callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 DAHelper.getType("dataability:///com.example.DataAbility", (err, data) => {
@@ -199,7 +199,7 @@ getType(uri: string): Promise\<string>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 DAHelper.getType("dataability:///com.example.DataAbility").then((data) => {
@@ -227,7 +227,7 @@ getFileTypes(uri: string, mimeTypeFilter: string, callback: AsyncCallback<Array\
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 DAHelper.getFileTypes( "dataability:///com.example.DataAbility",
@@ -263,7 +263,7 @@ getFileTypes(uri: string, mimeTypeFilter: string): Promise\<Array\<string>>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 DAHelper.getFileTypes("dataability:///com.example.DataAbility",
@@ -291,7 +291,7 @@ normalizeUri(uri: string, callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 DAHelper.normalizeUri("dataability:///com.example.DataAbility", (err, data) => {
@@ -323,7 +323,7 @@ normalizeUri(uri: string): Promise\<string>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 DAHelper.normalizeUri("dataability:///com.example.DataAbility",).then((data) => {
@@ -350,7 +350,7 @@ denormalizeUri(uri: string, callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 DAHelper.denormalizeUri("dataability:///com.example.DataAbility", (err, data) => {
@@ -384,7 +384,7 @@ denormalizeUri(uri: string): Promise\<string>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 DAHelper.denormalizeUri("dataability:///com.example.DataAbility",).then((data) => {
@@ -411,7 +411,7 @@ notifyChange(uri: string, callback: AsyncCallback\<void>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var helper = featureAbility.acquireDataAbilityHelper(
+let helper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 helper.notifyChange("dataability:///com.example.DataAbility", (err) => {
@@ -443,7 +443,7 @@ notifyChange(uri: string): Promise\<void>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 DAHelper.notifyChange("dataability:///com.example.DataAbility").then(() => {
@@ -471,7 +471,7 @@ insert(uri: string, valuesBucket: rdb.ValuesBucket, callback: AsyncCallback\<num
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 const valueBucket = {
@@ -511,7 +511,7 @@ insert(uri: string, valuesBucket: rdb.ValuesBucket): Promise\<number>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 const valueBucket = {
@@ -545,10 +545,10 @@ batchInsert(uri: string, valuesBuckets: Array\<rdb.ValuesBucket>, callback: Asyn
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
-var cars = new Array({"name": "roe11", "age": 21, "salary": 20.5, "blobType": "u8",},
+let cars = new Array({"name": "roe11", "age": 21, "salary": 20.5, "blobType": "u8",},
                      {"name": "roe12", "age": 21, "salary": 20.5, "blobType": "u8",},
                      {"name": "roe13", "age": 21, "salary": 20.5, "blobType": "u8",})
 DAHelper.batchInsert("dataability:///com.example.DataAbility", cars,
@@ -582,10 +582,10 @@ batchInsert(uri: string, valuesBuckets: Array<rdb.ValuesBucket>): Promise\<numbe
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
-var cars = new Array({"name": "roe11", "age": 21, "salary": 20.5, "blobType": "u8",},
+let cars = new Array({"name": "roe11", "age": 21, "salary": 20.5, "blobType": "u8",},
                      {"name": "roe12", "age": 21, "salary": 20.5, "blobType": "u8",},
                      {"name": "roe13", "age": 21, "salary": 20.5, "blobType": "u8",})
 DAHelper.batchInsert("dataability:///com.example.DataAbility", cars).then((data) => {
@@ -614,7 +614,7 @@ delete(uri: string, predicates: dataAbility.DataAbilityPredicates, callback: Asy
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
 import ohos_data_ability from '@ohos.data.dataAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 let da = new ohos_data_ability.DataAbilityPredicates()
@@ -650,7 +650,7 @@ delete(uri: string, predicates?: dataAbility.DataAbilityPredicates): Promise\<nu
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
 import ohos_data_ability from '@ohos.data.dataAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 let da = new ohos_data_ability.DataAbilityPredicates()
@@ -681,7 +681,7 @@ update(uri: string, valuesBucket: rdb.ValuesBucket, predicates: dataAbility.Data
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
 import ohos_data_ability from '@ohos.data.dataAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 const va = {
@@ -723,7 +723,7 @@ update(uri: string, valuesBucket: rdb.ValuesBucket, predicates?: dataAbility.Dat
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
 import ohos_data_ability from '@ohos.data.dataAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 const va = {
@@ -760,10 +760,10 @@ query(uri: string, columns: Array\<string>, predicates: dataAbility.DataAbilityP
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
 import ohos_data_ability from '@ohos.data.dataAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
-var cars=new Array("value1", "value2", "value3", "value4");
+let cars=new Array("value1", "value2", "value3", "value4");
 let da = new ohos_data_ability.DataAbilityPredicates()
 DAHelper.query("dataability:///com.example.DataAbility", cars, da, (err, data) => {
     console.info("==========================>Called=======================>");
@@ -799,10 +799,10 @@ query(uri: string, columns?: Array\<string>, predicates?: dataAbility.DataAbilit
 ```ts
 import featureAbility from '@ohos.ability.featureAbility'
 import ohos_data_ability from '@ohos.data.dataAbility'
-var DAHelper = featureAbility.acquireDataAbilityHelper(
+let DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
-var cars = new Array("value1", "value2", "value3", "value4");
+let cars = new Array("value1", "value2", "value3", "value4");
 let da = new ohos_data_ability.DataAbilityPredicates()
 DAHelper.query("dataability:///com.example.DataAbility", cars, da).then((data) => {
     console.info("==========================>queryCallback=======================>");
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inner-app-context.md b/zh-cn/application-dev/reference/apis/js-apis-inner-app-context.md
index 19320b673dbebec366d4c01c3b42d358ed81fe93..2a2db17446a8918d850a5b7a143046ea45028379 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inner-app-context.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inner-app-context.md
@@ -13,7 +13,7 @@ Context对象是在featureAbility中创建实例，并通过featureAbility的[ge
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getOrCreateLocalDir().then((data) => {
     console.info("getOrCreateLocalDir data: " + JSON.stringify(data));
 });
@@ -39,7 +39,7 @@ getOrCreateLocalDir(callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getOrCreateLocalDir((err, data)=>{
     console.info("getOrCreateLocalDir err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -67,7 +67,7 @@ getOrCreateLocalDir(): Promise\<string>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getOrCreateLocalDir().then((data) => {
     console.info("getOrCreateLocalDir data: " + JSON.stringify(data));
 });
@@ -94,7 +94,7 @@ verifyPermission(permission: string, options: PermissionOptions, callback: Async
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
 import bundle from '@ohos.bundle';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 bundle.getBundleInfo('com.context.test', 1, (err, datainfo) =>{
     context.verifyPermission("com.example.permission", {uid:datainfo.uid}, (err, data) =>{
         console.info("verifyPermission err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
@@ -123,7 +123,7 @@ verifyPermission(permission: string, callback: AsyncCallback\<number>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.verifyPermission("com.example.permission", (err, data) =>{
     console.info("verifyPermission err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -154,8 +154,8 @@ verifyPermission(permission: string, options?: PermissionOptions): Promise\<numb
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
-var Permission = {pid:1};
+let context = featureAbility.getContext();
+let Permission = {pid:1};
 context.verifyPermission('com.context.permission',Permission).then((data) => {
     console.info("verifyPermission data: " + JSON.stringify(data));
 });
@@ -183,7 +183,7 @@ requestPermissionsFromUser(permissions: Array\<string>, requestCode: number, res
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.requestPermissionsFromUser(
     ["com.example.permission1",
      "com.example.permission2",
@@ -223,7 +223,7 @@ requestPermissionsFromUser(permissions: Array\<string>, requestCode: number): Pr
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.requestPermissionsFromUser(
     ["com.example.permission1",
      "com.example.permission2",
@@ -256,7 +256,7 @@ getApplicationInfo(callback: AsyncCallback\<ApplicationInfo>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getApplicationInfo((err, data) => {
     console.info("getApplicationInfo err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -282,7 +282,7 @@ getApplicationInfo(): Promise\<ApplicationInfo>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getApplicationInfo().then((data) => {
     console.info("getApplicationInfo data: " + JSON.stringify(data));
 });
@@ -308,7 +308,7 @@ getBundleName(callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getBundleName((err, data) => {
     console.info("getBundleName err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -334,7 +334,7 @@ getBundleName(): Promise\<string>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getBundleName().then((data) => {
     console.info("getBundleName data: " + JSON.stringify(data));
 });
@@ -358,7 +358,7 @@ getDisplayOrientation(callback: AsyncCallback\<bundle.DisplayOrientation>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getDisplayOrientation((err, data) => {
     console.info("getDisplayOrientation err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -382,7 +382,7 @@ getDisplayOrientation(): Promise\<bundle.DisplayOrientation>;
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getDisplayOrientation().then((data) => {
     console.info("getDisplayOrientation data: " + JSON.stringify(data));
 });
@@ -406,7 +406,7 @@ getExternalCacheDir(callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getExternalCacheDir((err, data) => {
     console.info("getExternalCacheDir err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -430,7 +430,7 @@ getExternalCacheDir(): Promise\<string>;
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getExternalCacheDir().then((data) => {
     console.info("getExternalCacheDir data: " + JSON.stringify(data));
 });
@@ -456,8 +456,8 @@ setDisplayOrientation(orientation: bundle.DisplayOrientation, callback: AsyncCal
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
 import bundle from '@ohos.bundle';
-var context = featureAbility.getContext();
-var orientation=bundle.DisplayOrientation.UNSPECIFIED
+let context = featureAbility.getContext();
+let orientation=bundle.DisplayOrientation.UNSPECIFIED
 context.setDisplayOrientation(orientation, (err) => {
     console.info("setDisplayOrientation err: " + JSON.stringify(err));
 });
@@ -483,8 +483,8 @@ setDisplayOrientation(orientation: bundle.DisplayOrientation): Promise\<void>;
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
 import bundle from '@ohos.bundle';
-var context = featureAbility.getContext();
-var orientation=bundle.DisplayOrientation.UNSPECIFIED
+let context = featureAbility.getContext();
+let orientation=bundle.DisplayOrientation.UNSPECIFIED
 context.setDisplayOrientation(orientation).then((data) => {
     console.info("setDisplayOrientation data: " + JSON.stringify(data));
 });
@@ -509,8 +509,8 @@ setShowOnLockScreen(show: boolean, callback: AsyncCallback\<void>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
-var show=true
+let context = featureAbility.getContext();
+let show=true
 context.setShowOnLockScreen(show, (err) => {
     console.info("setShowOnLockScreen err: " + JSON.stringify(err));
 });
@@ -540,8 +540,8 @@ setShowOnLockScreen(show: boolean): Promise\<void>;
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
-var show=true
+let context = featureAbility.getContext();
+let show=true
 context.setShowOnLockScreen(show).then((data) => {
     console.info("setShowOnLockScreen data: " + JSON.stringify(data));
 });
@@ -566,8 +566,8 @@ setWakeUpScreen(wakeUp: boolean, callback: AsyncCallback\<void>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
-var wakeUp=true
+let context = featureAbility.getContext();
+let wakeUp=true
 context.setWakeUpScreen(wakeUp, (err) => {
     console.info("setWakeUpScreen err: " + JSON.stringify(err));
 });
@@ -597,8 +597,8 @@ setWakeUpScreen(wakeUp: boolean): Promise\<void>;
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
-var wakeUp=true
+let context = featureAbility.getContext();
+let wakeUp=true
 context.setWakeUpScreen(wakeUp).then((data) => {
     console.info("setWakeUpScreen data: " + JSON.stringify(data));
 });
@@ -625,7 +625,7 @@ getProcessInfo(callback: AsyncCallback\<ProcessInfo>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getProcessInfo((err, data) => {
     console.info("getProcessInfo err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -651,7 +651,7 @@ getProcessInfo(): Promise\<ProcessInfo>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getProcessInfo().then((data) => {
     console.info("getProcessInfo data: " + JSON.stringify(data));
 });
@@ -679,7 +679,7 @@ getElementName(callback: AsyncCallback\<ElementName>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getElementName((err, data) => {
     console.info("getElementName err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -707,7 +707,7 @@ getElementName(): Promise\<ElementName>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getElementName().then((data) => {
     console.info("getElementName data: " + JSON.stringify(data));
 });
@@ -731,7 +731,7 @@ getProcessName(callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getProcessName((err, data) => {
     console.info("getProcessName err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -757,7 +757,7 @@ getProcessName(): Promise\<string>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getProcessName().then((data) => {
     console.info("getProcessName data: " + JSON.stringify(data));
 });
@@ -783,7 +783,7 @@ getCallingBundle(callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getCallingBundle((err, data) => {
     console.info("getCallingBundle err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -809,7 +809,7 @@ getCallingBundle(): Promise\<string>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getCallingBundle().then((data) => {
     console.info("getCallingBundle data: " + JSON.stringify(data));
 });
@@ -833,7 +833,7 @@ getCacheDir(callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getCacheDir((err, data) => {
     console.info("getCacheDir err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -857,7 +857,7 @@ getCacheDir(): Promise\<string>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getCacheDir().then((data) => {
     console.info("getCacheDir data: " + JSON.stringify(data));
 });
@@ -881,7 +881,7 @@ getFilesDir(callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getFilesDir((err, data) => {
     console.info("getFilesDir err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -905,7 +905,7 @@ getFilesDir(): Promise\<string>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getFilesDir().then((data) => {
     console.info("getFilesDir data: " + JSON.stringify(data));
 });
@@ -931,7 +931,7 @@ getOrCreateDistributedDir(callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getOrCreateDistributedDir((err, data) => {
     console.info("getOrCreateDistributedDir err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -957,7 +957,7 @@ getOrCreateDistributedDir(): Promise\<string>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getOrCreateDistributedDir().then((data) => {
     console.info("getOrCreateDistributedDir data: " + JSON.stringify(data));
 });
@@ -981,7 +981,7 @@ getAppType(callback: AsyncCallback\<string>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getAppType((err, data) => {
     console.info("getAppType err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -1005,7 +1005,7 @@ getAppType(): Promise\<string>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getAppType().then((data) => {
     console.info("getAppType data: " + JSON.stringify(data));
 });
@@ -1029,7 +1029,7 @@ getHapModuleInfo(callback: AsyncCallback\<HapModuleInfo>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getHapModuleInfo((err, data) => {
     console.info("getHapModuleInfo err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -1053,7 +1053,7 @@ getHapModuleInfo(): Promise\<HapModuleInfo>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getHapModuleInfo().then((data) => {
     console.info("getHapModuleInfo data: " + JSON.stringify(data));
 });
@@ -1077,7 +1077,7 @@ getAppVersionInfo(callback: AsyncCallback\<AppVersionInfo>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getAppVersionInfo((err, data) => {
     console.info("getAppVersionInfo err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -1101,7 +1101,7 @@ getAppVersionInfo(): Promise\<AppVersionInfo>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getAppVersionInfo().then((data) => {
     console.info("getAppVersionInfo data: " + JSON.stringify(data));
 });
@@ -1125,7 +1125,7 @@ getAbilityInfo(callback: AsyncCallback\<AbilityInfo>): void
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getAbilityInfo((err, data) => {
     console.info("getAbilityInfo err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -1149,7 +1149,7 @@ getAbilityInfo(): Promise\<AbilityInfo>
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getAbilityInfo().then((data) => {
     console.info("getAbilityInfo data: " + JSON.stringify(data));
 });
@@ -1173,7 +1173,7 @@ getApplicationContext(): Context
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext().getApplicationContext();
+let context = featureAbility.getContext().getApplicationContext();
 ```
 
 ## Context.isUpdatingConfigurations<sup>7+</sup>
@@ -1194,7 +1194,7 @@ isUpdatingConfigurations(callback: AsyncCallback\<boolean>): void;
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.isUpdatingConfigurations((err, data) => {
     console.info("isUpdatingConfigurations err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
 });
@@ -1218,7 +1218,7 @@ isUpdatingConfigurations(): Promise\<boolean>;
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.isUpdatingConfigurations().then((data) => {
     console.info("isUpdatingConfigurations data: " + JSON.stringify(data));
 });
@@ -1242,7 +1242,7 @@ printDrawnCompleted(callback: AsyncCallback\<void>): void;
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.printDrawnCompleted((err) => {
     console.error('printDrawnCompleted err: ' + JSON.stringify(err));
 });
@@ -1266,7 +1266,7 @@ printDrawnCompleted(): Promise\<void>;
 
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.printDrawnCompleted().then((data) => {
     console.info("printDrawnCompleted data: " + JSON.stringify(data));
 });
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inner-app-processInfo.md b/zh-cn/application-dev/reference/apis/js-apis-inner-app-processInfo.md
index c648a2e0fc59849165c02b7b2a8ea395c086cfcd..bcb283693fd299d935a7afa82ca181b9a08c91bf 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inner-app-processInfo.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inner-app-processInfo.md
@@ -17,7 +17,7 @@
 ```ts
 import featureAbility from '@ohos.ability.featureAbility';
 
-var context = featureAbility.getContext();
+let context = featureAbility.getContext();
 context.getProcessInfo((err, data) => {
     if (err.code != 0) {
         console.info("getProcessInfo err: " + JSON.stringify(err) + "data: " + JSON.stringify(data));
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inner-application-abilityDelegatorArgs.md b/zh-cn/application-dev/reference/apis/js-apis-inner-application-abilityDelegatorArgs.md
index acfee709e8a997133c0b50c2d17ce3c9fe888989..560503e5f56ddbc528cebc4018150c0a9e067ce9 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inner-application-abilityDelegatorArgs.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inner-application-abilityDelegatorArgs.md
@@ -28,5 +28,5 @@ AbilityDelegatorArgs模块提供在应用程序启动期间，用于存储已注
 ```ts
 import AbilityDelegatorRegistry from '@ohos.application.abilityDelegatorRegistry';
 
-var args = AbilityDelegatorRegistry.getArguments();
+let args = AbilityDelegatorRegistry.getArguments();
 ```
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inner-application-abilityMonitor.md b/zh-cn/application-dev/reference/apis/js-apis-inner-application-abilityMonitor.md
index 767578018c3fe685801f8cf5bed4d0ec23738955..6026ff334b32e0892c8e6061073eed11efc2841d 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inner-application-abilityMonitor.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inner-application-abilityMonitor.md
@@ -36,12 +36,12 @@ function onAbilityCreateCallback(data) {
     console.info("onAbilityCreateCallback");
 }
 
-var monitor = {
+let monitor = {
     abilityName: "abilityname",
     onAbilityCreate: onAbilityCreateCallback
 }
 
-var abilityDelegator = AbilityDelegatorRegistry.getAbilityDelegator();
+let abilityDelegator = AbilityDelegatorRegistry.getAbilityDelegator();
 abilityDelegator.addAbilityMonitor(monitor, (err : any) => {
     console.info("addAbilityMonitor callback");
 });
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inner-application-applicationContext.md b/zh-cn/application-dev/reference/apis/js-apis-inner-application-applicationContext.md
index 41dc3d57e5bd6782f1f8a2e32d27a6ddb41ab46e..89accd1caa760ef3f756d56caaf0e8f77415fee5 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inner-application-applicationContext.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inner-application-applicationContext.md
@@ -41,7 +41,7 @@ on(type: "abilityLifecycle", callback: AbilityLifecycleCallback): **number**;
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
 
-var lifecycleId;
+let lifecycleId;
 
 export default class EntryAbility extends UIAbility {
     onCreate() {
@@ -109,7 +109,7 @@ off(type: "abilityLifecycle", callbackId: **number**,  callback: AsyncCallback<*
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
 
-var lifecycleId;
+let lifecycleId;
 
 export default class EntryAbility extends UIAbility {
     onDestroy() {
@@ -142,7 +142,7 @@ off(type: "abilityLifecycle", callbackId: **number**): **void**;
 ```ts
 import Ability from "@ohos.app.ability.UIAbility";
 
-var lifecycleId;
+let lifecycleId;
 
 export default class MyAbility extends Ability {
     onDestroy() {
@@ -179,7 +179,7 @@ on(type: "environment", callback: EnvironmentCallback): **number**;
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
 
-var callbackId;
+let callbackId;
 
 export default class EntryAbility extends UIAbility {
     onCreate() {
@@ -223,7 +223,7 @@ off(type: "environment", callbackId: **number**,  callback: AsyncCallback<**void
 ```ts
 import UIAbility from '@ohos.app.ability.UIAbility';
 
-var callbackId;
+let callbackId;
 
 export default class EntryAbility extends UIAbility {
     onDestroy() {
@@ -255,7 +255,7 @@ off(type: "environment", callbackId: **number**,  callback: AsyncCallback<**void
 ```ts
 import Ability from "@ohos.app.ability.UIAbility";
 
-var callbackId;
+let callbackId;
 
 export default class MyAbility extends Ability {
     onDestroy() {
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inner-application-extensionContext.md b/zh-cn/application-dev/reference/apis/js-apis-inner-application-extensionContext.md
index 071b5563b7621ae381123b55bb09f90009106acb..9e9154fb65b1f60190e2ba0943bfd02cbad91f7e 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inner-application-extensionContext.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inner-application-extensionContext.md
@@ -88,7 +88,7 @@ export default class ServiceModel {
             return;
         }
 
-        var moduleInfo = globalThis.ExtensionContext.currentHapModuleInfo;
+        let moduleInfo = globalThis.ExtensionContext.currentHapModuleInfo;
         this.moduleName = moduleInfo.name;
         // 根据moduleName执行不同的业务逻辑，实现对不同性能设备的区分
         switch (this.moduleName) {
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inner-application-missionSnapshot.md b/zh-cn/application-dev/reference/apis/js-apis-inner-application-missionSnapshot.md
index 6cfb665902e90388e9043432406e64996bfe9daf..2dba37ff19cd3f8eac0567d2661a42d0ba396243 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inner-application-missionSnapshot.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inner-application-missionSnapshot.md
@@ -28,7 +28,7 @@ missionManager.getMissionInfos("", 10, (error, missions) => {
   console.log("getMissionInfos is called, error.code = " + error.code);
   console.log("size = " + missions.length);
   console.log("missions = " + JSON.stringify(missions));
-  var id = missions[0].missionId;
+  let id = missions[0].missionId;
 
   missionManager.getMissionSnapShot("", id, (error, snapshot) => {
     console.log("getMissionSnapShot is called, error.code = " + error.code);
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inner-application-serviceExtensionContext.md b/zh-cn/application-dev/reference/apis/js-apis-inner-application-serviceExtensionContext.md
index d1e4ce8fe87b619680f64bc080d6ab87d1bfc33e..8ef06b823ea366009d3fb520e0c779671ebefa38 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inner-application-serviceExtensionContext.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inner-application-serviceExtensionContext.md
@@ -68,7 +68,7 @@ startAbility(want: Want, callback: AsyncCallback&lt;void&gt;): void;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     bundleName: "com.example.myapp",
     abilityName: "MyAbility"
   };
@@ -141,11 +141,11 @@ startAbility(want: Want, options?: StartOptions): Promise\<void>;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     bundleName: "com.example.myapp",
     abilityName: "MyAbility"
   };
-  var options = {
+  let options = {
   	windowMode: 0,
   };
 
@@ -212,12 +212,12 @@ startAbility(want: Want, options: StartOptions, callback: AsyncCallback&lt;void&
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var options = {
+  let options = {
     windowMode: 0
   };
 
@@ -290,12 +290,12 @@ startAbilityWithAccount(want: Want, accountId: number, callback: AsyncCallback\<
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
+  let accountId = 100;
 
   try {
     this.context.startAbilityWithAccount(want, accountId, (error) => {
@@ -367,13 +367,13 @@ startAbilityWithAccount(want: Want, accountId: number, options: StartOptions, ca
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
-  var options = {
+  let accountId = 100;
+  let options = {
     windowMode: 0
   };
 
@@ -453,13 +453,13 @@ startAbilityWithAccount(want: Want, accountId: number, options?: StartOptions):
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
-  var options = {
+  let accountId = 100;
+  let options = {
     windowMode: 0
   };
 
@@ -518,7 +518,7 @@ startServiceExtensionAbility(want: Want, callback: AsyncCallback\<void>): void;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
@@ -584,7 +584,7 @@ startServiceExtensionAbility(want: Want): Promise\<void>;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
@@ -650,12 +650,12 @@ startServiceExtensionAbilityWithAccount(want: Want, accountId: number, callback:
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
+  let accountId = 100;
 
   try {
     this.context.startServiceExtensionAbilityWithAccount(want, accountId, (error) => {
@@ -721,12 +721,12 @@ startServiceExtensionAbilityWithAccount(want: Want, accountId: number): Promise\
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
+  let accountId = 100;
 
   try {
     this.context.startServiceExtensionAbilityWithAccount(want, accountId)
@@ -780,7 +780,7 @@ stopServiceExtensionAbility(want: Want, callback: AsyncCallback\<void>): void;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
@@ -843,7 +843,7 @@ stopServiceExtensionAbility(want: Want): Promise\<void>;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
@@ -905,12 +905,12 @@ stopServiceExtensionAbilityWithAccount(want: Want, accountId: number, callback:
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
+  let accountId = 100;
 
   try {
     this.context.stopServiceExtensionAbilityWithAccount(want, accountId, (error) => {
@@ -973,12 +973,12 @@ stopServiceExtensionAbilityWithAccount(want: Want, accountId: number): Promise\<
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
+  let accountId = 100;
 
   try {
     this.context.stopServiceExtensionAbilityWithAccount(want, accountId)
@@ -1118,17 +1118,17 @@ connectServiceExtensionAbility(want: Want, options: ConnectOptions): number;
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     bundleName: "com.example.myapp",
     abilityName: "MyAbility"
   };
-  var options = {
+  let options = {
     onConnect(elementName, remote) { console.log('----------- onConnect -----------') },
     onDisconnect(elementName) { console.log('----------- onDisconnect -----------') },
     onFailed(code) { console.log('----------- onFailed -----------') }
   }
 
-  var connection = null;
+  let connection = null;
   try {
     connection = this.context.connectServiceExtensionAbility(want, options);
   } catch (paramError) {
@@ -1178,19 +1178,19 @@ connectServiceExtensionAbilityWithAccount(want: Want, accountId: number, options
 **示例：**
 
   ```ts
-  var want = {
+  let want = {
     deviceId: "",
     bundleName: "com.extreme.test",
     abilityName: "MainAbility"
   };
-  var accountId = 100;
-  var options = {
+  let accountId = 100;
+  let options = {
     onConnect(elementName, remote) { console.log('----------- onConnect -----------') },
     onDisconnect(elementName) { console.log('----------- onDisconnect -----------') },
     onFailed(code) { console.log('----------- onFailed -----------') }
   }
 
-  var connection = null;
+  let connection = null;
   try {
     connection = this.context.connectServiceExtensionAbilityWithAccount(want, accountId, options);
   } catch (paramError) {
@@ -1232,7 +1232,7 @@ disconnectServiceExtensionAbility(connection: number, callback:AsyncCallback&lt;
 
   ```ts
   // connection为connectServiceExtensionAbility中的返回值
-  var connection = 1;
+  let connection = 1;
 
   try {
     this.context.disconnectServiceExtensionAbility(connection, (error) => {
@@ -1289,7 +1289,7 @@ disconnectServiceExtensionAbility(connection: number): Promise&lt;void&gt;;
 
   ```ts
   // connection为connectServiceExtensionAbility中的返回值
-  var connection = 1;
+  let connection = 1;
 
   try {
     this.context.disconnectServiceExtensionAbility(connection)
@@ -1355,10 +1355,10 @@ startAbilityByCall(want: Want): Promise&lt;Caller&gt;;
   后台启动：
 
   ```ts
-  var caller = undefined;
+  let caller = undefined;
 
   // 后台启动Ability，不配置parameters
-  var wantBackground = {
+  let wantBackground = {
       bundleName: "com.example.myservice",
       moduleName: "entry",
       abilityName: "MainAbility",
@@ -1386,10 +1386,10 @@ startAbilityByCall(want: Want): Promise&lt;Caller&gt;;
   前台启动：
 
   ```ts
-  var caller = undefined;
+  let caller = undefined;
 
   // 前台启动Ability，将parameters中的"ohos.aafwk.param.callAbilityToForeground"配置为true
-  var wantForeground = {
+  let wantForeground = {
       bundleName: "com.example.myservice",
       moduleName: "entry",
       abilityName: "MainAbility",
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inner-application-uiAbilityContext.md b/zh-cn/application-dev/reference/apis/js-apis-inner-application-uiAbilityContext.md
index 212a2428e5e77a8de8344be9d0242e2357d69e30..1f56e2f24ed5c7503a002797395dbb095082b0cc 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-inner-application-uiAbilityContext.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inner-application-uiAbilityContext.md
@@ -249,7 +249,10 @@ startAbility(want: Want, options?: StartOptions): Promise&lt;void&gt;;
 
 startAbilityForResult(want: Want, callback: AsyncCallback&lt;AbilityResult&gt;): void;
 
-启动一个Ability。Ability被启动后，正常情况下可通过调用[terminateSelfWithResult](#uiabilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用者。异常情况下比如杀死Ability会返回异常信息给调用者（callback形式）。
+启动一个Ability。Ability被启动后，有如下情况(callback形式):
+ - 正常情况下可通过调用[terminateSelfWithResult](#uiabilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用方。
+ - 异常情况下比如杀死Ability会返回异常信息给调用方, 异常信息中resultCode为-1。
+ - 如果被启动的Ability模式是单实例模式, 不同应用多次调用该接口启动这个Ability，当这个Ability调用[terminateSelfWithResult](#uiabilitycontextterminateselfwithresult)接口使之终止时，只将正常结果返回给最后一个调用方, 其它调用方返回异常信息, 异常信息中resultCode为-1。
 
 使用规则：
  - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
@@ -321,7 +324,10 @@ startAbilityForResult(want: Want, callback: AsyncCallback&lt;AbilityResult&gt;):
 
 startAbilityForResult(want: Want, options: StartOptions, callback: AsyncCallback&lt;AbilityResult&gt;): void;
 
-启动一个Ability。Ability被启动后，正常情况下可通过调用[terminateSelfWithResult](#uiabilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用者。异常情况下比如杀死Ability会返回异常信息给调用者（callback形式）。
+启动一个Ability。Ability被启动后，有如下情况(callback形式):
+ - 正常情况下可通过调用[terminateSelfWithResult](#uiabilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用方。
+ - 异常情况下比如杀死Ability会返回异常信息给调用方, 异常信息中resultCode为-1。
+ - 如果被启动的Ability模式是单实例模式, 不同应用多次调用该接口启动这个Ability，当这个Ability调用[terminateSelfWithResult](#uiabilitycontextterminateselfwithresult)接口使之终止时，只将正常结果返回给最后一个调用方, 其它调用方返回异常信息, 异常信息中resultCode为-1。
 
 使用规则：
  - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限
@@ -398,7 +404,10 @@ startAbilityForResult(want: Want, options: StartOptions, callback: AsyncCallback
 
 startAbilityForResult(want: Want, options?: StartOptions): Promise&lt;AbilityResult&gt;;
 
-启动一个Ability。Ability被启动后，正常情况下可通过调用[terminateSelfWithResult](#uiabilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用者。异常情况下比如杀死Ability会返回异常信息给调用者（promise形式）。
+启动一个Ability。Ability被启动后，有如下情况(promise形式):
+ - 正常情况下可通过调用[terminateSelfWithResult](#uiabilitycontextterminateselfwithresult)接口使之终止并且返回结果给调用方。
+ - 异常情况下比如杀死Ability会返回异常信息给调用方, 异常信息中resultCode为-1。
+ - 如果被启动的Ability模式是单实例模式, 不同应用多次调用该接口启动这个Ability，当这个Ability调用[terminateSelfWithResult](#uiabilitycontextterminateselfwithresult)接口使之终止时，只将正常结果返回给最后一个调用方, 其它调用方返回异常信息, 异常信息中resultCode为-1。
 
 使用规则：
  - 调用方应用位于后台时，使用该接口启动Ability需申请`ohos.permission.START_ABILITIES_FROM_BACKGROUND`权限