diff --git a/zh-cn/application-dev/reference/apis/js-apis-backgroundTaskManager.md b/zh-cn/application-dev/reference/apis/js-apis-backgroundTaskManager.md
index efed827ea454ccca8441b20d897ce01591783ab3..fa4599ed7a537d6f4bc802e10e0ad9777b19645c 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-backgroundTaskManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-backgroundTaskManager.md
@@ -205,9 +205,9 @@ wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
 Stage模型示例：
 
 ```ts
-import Ability from '@ohos.application.Ability';
+import UIAbility from '@ohos.app.ability.UIAbility';
 import backgroundTaskManager from '@ohos.backgroundTaskManager';
-import wantAgent from '@ohos.wantAgent';
+import wantAgent from '@ohos.app.ability.wantAgent';
 
 function callback(err, data) {
     if (err) {
@@ -217,13 +217,13 @@ function callback(err, data) {
     }
 }
 
-export default class MainAbility extends Ability {
+export default class EntryAbility extends UIAbility {
     onCreate(want, launchParam) {
         let wantAgentInfo = {
             wants: [
                 {
                     bundleName: "com.example.myapplication",
-                    abilityName: "com.example.myapplication.MainAbility"
+                    abilityName: "EntryAbility"
                 }
             ],
             operationType: wantAgent.OperationType.START_ABILITY,
@@ -297,17 +297,17 @@ wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
 Stage模型示例：
 
 ```ts
-import Ability from '@ohos.application.Ability';
+import UIAbility from '@ohos.app.ability.UIAbility';
 import backgroundTaskManager from '@ohos.backgroundTaskManager';
-import wantAgent from '@ohos.wantAgent';
+import wantAgent from '@ohos.app.ability.wantAgent';
 
-export default class MainAbility extends Ability {
+export default class EntryAbility extends UIAbility {
     onCreate(want, launchParam) {
         let wantAgentInfo = {
             wants: [
                 {
                     bundleName: "com.example.myapplication",
-                    abilityName: "com.example.myapplication.MainAbility"
+                    abilityName: "EntryAbility"
                 }
             ],
             operationType: wantAgent.OperationType.START_ABILITY,
@@ -365,7 +365,7 @@ backgroundTaskManager.stopBackgroundRunning(featureAbility.getContext(), callbac
 Stage模型示例：
 
 ```ts
-import Ability from '@ohos.application.Ability';
+import UIAbility from '@ohos.app.ability.UIAbility';
 import backgroundTaskManager from '@ohos.backgroundTaskManager';
 
 function callback(err, data) {
@@ -376,7 +376,7 @@ function callback(err, data) {
     }
 }
 
-export default class MainAbility extends Ability {
+export default class EntryAbility extends UIAbility {
     onCreate(want, launchParam) {
         backgroundTaskManager.stopBackgroundRunning(this.context, callback);
     }
@@ -422,10 +422,10 @@ backgroundTaskManager.stopBackgroundRunning(featureAbility.getContext()).then(()
 Stage模型示例：
 
 ```ts
-import Ability from '@ohos.application.Ability';
+import UIAbility from '@ohos.app.ability.UIAbility';
 import backgroundTaskManager from '@ohos.backgroundTaskManager';
 
-export default class MainAbility extends Ability {
+export default class EntryAbility extends UIAbility {
     onCreate(want, launchParam) {
         backgroundTaskManager.stopBackgroundRunning(this.context).then(() => {
             console.info("Operation stopBackgroundRunning succeeded");
diff --git a/zh-cn/application-dev/reference/apis/js-apis-resourceschedule-backgroundTaskManager.md b/zh-cn/application-dev/reference/apis/js-apis-resourceschedule-backgroundTaskManager.md
index c9f77d0afa4b0f5ddc5156e51047bf6cff80a6b1..b9d826798fdd2de5aa9351200412daa06de9d1bf 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-resourceschedule-backgroundTaskManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-resourceschedule-backgroundTaskManager.md
@@ -255,9 +255,9 @@ startBackgroundRunning(context: Context, bgMode: BackgroundMode, wantAgent: Want
 **示例**：
 
 ```js
-import Ability from '@ohos.application.Ability'
+import UIAbility from '@ohos.app.ability.UIAbility';
 import backgroundTaskManager from '@ohos.resourceschedule.backgroundTaskManager';  
-import wantAgent from '@ohos.wantAgent';
+import wantAgent from '@ohos.app.ability.wantAgent';
 
 function callback(error, data) {
     if (error) {
@@ -267,13 +267,13 @@ function callback(error, data) {
     }
 }
 
-export default class MainAbility extends Ability {
+export default class EntryAbility extends UIAbility {
     onCreate(want, launchParam) {
         let wantAgentInfo = {
             wants: [
                 {
                     bundleName: "com.example.myapplication",
-                    abilityName: "MainAbility"
+                    abilityName: "EntryAbility"
                 }
             ],
             operationType: wantAgent.OperationType.START_ABILITY,
@@ -281,14 +281,18 @@ export default class MainAbility extends Ability {
             wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESENT_FLAG]
         };
 
-        wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
-            try {
-                backgroundTaskManager.startBackgroundRunning(this.context,
-                    backgroundTaskManager.BackgroundMode.LOCATION, wantAgentObj, callback)
-            } catch (error) {
-                console.error(`Operation startBackgroundRunning failed. code is ${error.code} message is ${error.message}`);
-            }
-        });
+        try {
+            wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
+                try {
+                    backgroundTaskManager.startBackgroundRunning(this.context,
+                        backgroundTaskManager.BackgroundMode.LOCATION, wantAgentObj, callback)
+                } catch (error) {
+                    console.error(`Operation startBackgroundRunning failed. code is ${error.code} message is ${error.message}`);
+                }
+            });
+        } catch (error) {
+            console.error(`Operation getWantAgent failed. code is ${error.code} message is ${error.message}`);
+        }
     }
 };
 ```
@@ -334,17 +338,17 @@ startBackgroundRunning(context: Context, bgMode: BackgroundMode, wantAgent: Want
 **示例**：
 
 ```js
-import Ability from '@ohos.application.Ability'
+import UIAbility from '@ohos.app.ability.UIAbility';
 import backgroundTaskManager from '@ohos.resourceschedule.backgroundTaskManager'; 
-import wantAgent from '@ohos.wantAgent';
+import wantAgent from '@ohos.app.ability.wantAgent';
 
-export default class MainAbility extends Ability {
+export default class EntryAbility extends UIAbility {
     onCreate(want, launchParam) {
         let wantAgentInfo = {
             wants: [
                 {
                     bundleName: "com.example.myapplication",
-                    abilityName: "MainAbility"
+                    abilityName: "EntryAbility"
                 }
             ],
             operationType: wantAgent.OperationType.START_ABILITY,
@@ -352,18 +356,22 @@ export default class MainAbility extends Ability {
             wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESENT_FLAG]
         };
 
-        wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
-            try {
-                backgroundTaskManager.startBackgroundRunning(this.context,
-                    backgroundTaskManager.BackgroundMode.LOCATION, wantAgentObj).then(() => {
-                    console.info("Operation startBackgroundRunning succeeded");
-                }).catch((error) => {
+        try {
+            wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
+                try {
+                    backgroundTaskManager.startBackgroundRunning(this.context,
+                        backgroundTaskManager.BackgroundMode.LOCATION, wantAgentObj).then(() => {
+                        console.info("Operation startBackgroundRunning succeeded");
+                    }).catch((error) => {
+                        console.error(`Operation startBackgroundRunning failed. code is ${error.code} message is ${error.message}`);
+                    });
+                } catch (error) {
                     console.error(`Operation startBackgroundRunning failed. code is ${error.code} message is ${error.message}`);
-                });
-            } catch (error) {
-                console.error(`Operation startBackgroundRunning failed. code is ${error.code} message is ${error.message}`);
-            }
-        });
+                }
+            });
+        } catch (error) {
+            console.error(`Operation getWantAgent failed. code is ${error.code} message is ${error.message}`);
+        }
     }
 };
 ```
@@ -400,7 +408,7 @@ stopBackgroundRunning(context: Context, callback: AsyncCallback<void>): vo
 **示例**：
 
 ```js
-import Ability from '@ohos.application.Ability'
+import UIAbility from '@ohos.app.ability.UIAbility';
 import backgroundTaskManager from '@ohos.resourceschedule.backgroundTaskManager';  
 
 function callback(error, data) {
@@ -411,7 +419,7 @@ function callback(error, data) {
     }
 }
 
-export default class MainAbility extends Ability {
+export default class EntryAbility extends UIAbility {
     onCreate(want, launchParam) {
         try {
             backgroundTaskManager.stopBackgroundRunning(this.context, callback);
@@ -461,10 +469,10 @@ stopBackgroundRunning(context: Context): Promise<void>
 **示例**：
 
 ```js
-import Ability from '@ohos.application.Ability'
+import UIAbility from '@ohos.app.ability.UIAbility';
 import backgroundTaskManager from '@ohos.resourceschedule.backgroundTaskManager';  
 
-export default class MainAbility extends Ability {
+export default class EntryAbility extends UIAbility {
     onCreate(want, launchParam) {
         try {
             backgroundTaskManager.stopBackgroundRunning(this.context).then(() => {