diff --git a/zh-cn/application-dev/background-task-management/background-task-dev-guide.md b/zh-cn/application-dev/background-task-management/background-task-dev-guide.md
index 92e3d3c99b700a391ab38e8fbe9d40d6388198ee..5a63a14acdb3b61bb765370cace0d7e5847aa322 100644
--- a/zh-cn/application-dev/background-task-management/background-task-dev-guide.md
+++ b/zh-cn/application-dev/background-task-management/background-task-dev-guide.md
@@ -42,7 +42,8 @@ import backgroundTaskManager from '@ohos.backgroundTaskManager';
         console.info("Request suspension delay will time out.");
     });
     
-    var id = delayInfo.requestId;console.info("requestId is: " + id);
+    var id = delayInfo.requestId;
+    console.info("requestId is: " + id);
     ```
 
 
@@ -50,9 +51,9 @@ import backgroundTaskManager from '@ohos.backgroundTaskManager';
 
     ```js
     backgroundTaskManager.getRemainingDelayTime(id).then( res => {
-        console.log('promise => Operation succeeded. Data: ' + JSON.stringify(res));
+        console.log('promise => Operation getRemainingDelayTime succeeded. Data: ' + JSON.stringify(res));
     }).catch( err => {
-        console.log('promise => Operation failed. Cause: ' + err.data);
+        console.log('promise => Operation getRemainingDelayTime failed. Cause: ' + err.data);
     });
     ```
 
@@ -83,9 +84,9 @@ console.info("The actualDelayTime is: " + time);
 
 // 获取应用程序进入挂起状态前的剩余时间
 backgroundTaskManager.getRemainingDelayTime(id).then( res => {
-    console.log('promise => Operation succeeded. Data: ' + JSON.stringify(res));
+    console.log('promise => Operation getRemainingDelayTime succeeded. Data: ' + JSON.stringify(res));
 }).catch( err => {
-    console.log('promise => Operation failed. Cause: ' + err.data);
+    console.log('promise => Operation getRemainingDelayTime failed. Cause: ' + err.data);
 });
 
 // 取消延迟挂起
@@ -172,16 +173,16 @@ ohos.permission.KEEP_BACKGROUND_RUNNING
         ],
         operationType: wantAgent.OperationType.START_ABILITY,
         requestCode: 0,
-        wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESET_FLAG]
+        wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESENT_FLAG]
     };
 
     // 通过wantAgent模块的getWantAgent方法获取WantAgent对象
     wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
         backgroundTaskManager.startBackgroundRunning(featureAbility.getContext(),
             backgroundTaskManager.BackgroundMode.DATA_TRANSFER, wantAgentObj).then(() => {
-            console.info("Operation succeeded");
+            console.info("Operation startBackgroundRunning succeeded");
         }).catch((err) => {
-            console.error("Operation failed Cause: " + err);
+            console.error("Operation startBackgroundRunning failed Cause: " + err);
         });
     });
     ```
@@ -193,9 +194,9 @@ ohos.permission.KEEP_BACKGROUND_RUNNING
     import featureAbility from '@ohos.ability.featureAbility';
     
     backgroundTaskManager.stopBackgroundRunning(featureAbility.getContext()).then(() => {
-        console.info("Operation succeeded");
+        console.info("Operation stopBackgroundRunning succeeded");
     }).catch((err) => {
-        console.error("Operation failed Cause: " + err);
+        console.error("Operation stopBackgroundRunning failed Cause: " + err);
     });
     
     ```
@@ -220,25 +221,25 @@ function startBackgroundRunning() {
         ],
         operationType: wantAgent.OperationType.START_ABILITY,
         requestCode: 0,
-        wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESET_FLAG]
+        wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESENT_FLAG]
     };
 
     // 通过wantAgent模块的getWantAgent方法获取WantAgent对象
     wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
         backgroundTaskManager.startBackgroundRunning(featureAbility.getContext(),
             backgroundTaskManager.BackgroundMode.DATA_TRANSFER, wantAgentObj).then(() => {
-            console.info("Operation succeeded");
+            console.info("Operation startBackgroundRunning succeeded");
         }).catch((err) => {
-            console.error("Operation failed Cause: " + err);
+            console.error("Operation startBackgroundRunning failed Cause: " + err);
         });
     });
 }
 
 function stopBackgroundRunning() {
     backgroundTaskManager.stopBackgroundRunning(featureAbility.getContext()).then(() => {
-        console.info("Operation succeeded");
+        console.info("Operation stopBackgroundRunning succeeded");
     }).catch((err) => {
-        console.error("Operation failed Cause: " + err);
+        console.error("Operation stopBackgroundRunning failed Cause: " + err);
     });
 }
 
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 5904644165e09533475ac6a2460f8b34e552df5c..3f8d0e482e570296e4a5503792b34e42721c5043 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-backgroundTaskManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-backgroundTaskManager.md
@@ -33,11 +33,17 @@ requestSuspendDelay(reason: string, callback: Callback<void>): DelaySuspen
 | [DelaySuspendInfo](#delaysuspendinfo) | 返回延迟挂起信息。 |
 
 **示例**：
+
   ```js
   let myReason = 'test requestSuspendDelay';
   let delayInfo = backgroundTaskManager.requestSuspendDelay(myReason, () => {
       console.info("Request suspension delay will time out.");
   })
+  
+  var id = delayInfo.requestId;
+  var time = delayInfo.actualDelayTime;
+  console.info("The requestId is: " + id);
+  console.info("The actualDelayTime is: " + time);
   ```
 
 
@@ -61,9 +67,9 @@ getRemainingDelayTime(requestId: number, callback: AsyncCallback<number>):
   let id = 1;
   backgroundTaskManager.getRemainingDelayTime(id, (err, res) => {
       if(err.data === 0) {
-          console.log('promise => Operation succeeded. Data: ' + JSON.stringify(res));
+          console.log('callback => Operation getRemainingDelayTime succeeded. Data: ' + JSON.stringify(res));
       } else {
-          console.log('promise => Operation failed. Cause: ' + err.data);
+          console.log('callback => Operation getRemainingDelayTime failed. Cause: ' + err.data);
       }
   })
   ```
@@ -91,9 +97,9 @@ getRemainingDelayTime(requestId: number): Promise<number>
   ```js
   let id = 1;
   backgroundTaskManager.getRemainingDelayTime(id).then( res => {
-      console.log('promise => Operation succeeded. Data: ' + JSON.stringify(res));
+      console.log('promise => Operation getRemainingDelayTime succeeded. Data: ' + JSON.stringify(res));
   }).catch( err => {
-      console.log('promise => Operation failed. Cause: ' + err.data);
+      console.log('promise => Operation getRemainingDelayTime failed. Cause: ' + err.data);
   })
   ```
 
@@ -143,9 +149,9 @@ import wantAgent from '@ohos.wantAgent';
 
 function callback(err, data) {
     if (err) {
-        console.error("Operation failed Cause: " + err);
+        console.error("Operation startBackgroundRunning failed Cause: " + err);
     } else {
-        console.info("Operation succeeded");
+        console.info("Operation startBackgroundRunning succeeded");
     }
 }
 
@@ -158,7 +164,7 @@ let wantAgentInfo = {
     ],
     operationType: wantAgent.OperationType.START_ABILITY,
     requestCode: 0,
-    wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESET_FLAG]
+    wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESENT_FLAG]
 };
 
 wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
@@ -206,15 +212,15 @@ let wantAgentInfo = {
     ],
     operationType: wantAgent.OperationType.START_ABILITY,
     requestCode: 0,
-    wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESET_FLAG]
+    wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESENT_FLAG]
 };
 
 wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj) => {
     backgroundTaskManager.startBackgroundRunning(featureAbility.getContext(),
         backgroundTaskManager.BackgroundMode.DATA_TRANSFER, wantAgentObj).then(() => {
-        console.info("Operation succeeded");
+        console.info("Operation startBackgroundRunning succeeded");
     }).catch((err) => {
-        console.error("Operation failed Cause: " + err);
+        console.error("Operation startBackgroundRunning failed Cause: " + err);
     });
 });
 
@@ -241,9 +247,9 @@ import featureAbility from '@ohos.ability.featureAbility';
 
 function callback(err, data) {
     if (err) {
-        console.error("Operation failed Cause: " + err);
+        console.error("Operation stopBackgroundRunning failed Cause: " + err);
     } else {
-        console.info("Operation succeeded");
+        console.info("Operation stopBackgroundRunning succeeded");
     }
 }
 
@@ -275,9 +281,9 @@ import backgroundTaskManager from '@ohos.backgroundTaskManager';
 import featureAbility from '@ohos.ability.featureAbility';
 
 backgroundTaskManager.stopBackgroundRunning(featureAbility.getContext()).then(() => {
-    console.info("Operation succeeded");
+    console.info("Operation stopBackgroundRunning succeeded");
 }).catch((err) => {
-    console.error("Operation failed Cause: " + err);
+    console.error("Operation stopBackgroundRunning failed Cause: " + err);
 });
 
 ```