diff --git a/RationalUseOfFrontEndResources/entry/src/main/ets/pages/MusicPlayRule.ets b/RationalUseOfFrontEndResources/entry/src/main/ets/pages/MusicPlayRule.ets
index 287e1e1e30f718885ff2bc648f4b7fdce52af42d..347c9a0212b8a19a767aa0310ff9e9f806a199b8 100644
--- a/RationalUseOfFrontEndResources/entry/src/main/ets/pages/MusicPlayRule.ets
+++ b/RationalUseOfFrontEndResources/entry/src/main/ets/pages/MusicPlayRule.ets
@@ -71,41 +71,47 @@ audio.createAudioRenderer(audioRendererOptions, (err, data) => {
 const uiContext: UIContext | undefined = AppStorage.get('uiContext');
 let context: Context = uiContext?.getHostContext()!;
 
-async function setListener() {
+async function setListener(): Promise<void> {
   // Assuming that a session has been created, see the previous example for how to create a session
   let type: avSession.AVSessionType = 'audio';
-  let session = await avSession.createAVSession(context, 'SESSION_NAME', type);
+  avSession.createAVSession(context, 'SESSION_NAME', type)
+    .then((session: avSession.AVSession) => {
+      // Set the duration of the property
+      let metadata: avSession.AVMetadata = {
+        assetId: '0',
+        title: 'TITLE',
+        mediaImage: 'IMAGE',
+        duration: 23000, // The duration of the resource, measured in milliseconds
+      };
 
-  // Set the duration of the property
-  let metadata: avSession.AVMetadata = {
-    assetId: '0',
-    title: 'TITLE',
-    mediaImage: 'IMAGE',
-    duration: 23000, // The duration of the resource, measured in milliseconds
-  };
-  session.setAVMetadata(metadata).then(() => {
-    hilog.info(0x0000, 'Sample', `SetAVMetadata successfully`);
-  }).catch((err: BusinessError) => {
-    hilog.error(0x0000, 'Sample', `Failed to set AVMetadata. Code: ${err.code}, message: ${err.message}`);
-  });
+      session.setAVMetadata(metadata)
+        .then(() => {
+          hilog.info(0x0000, 'Sample', `SetAVMetadata successfully`);
+        }).catch((err: BusinessError) => {
+        hilog.error(0x0000, 'Sample', `Failed to set AVMetadata. Code: ${err.code}, message: ${err.message}`);
+      });
 
-  // Set Status: Playback Status, Progress Position, Playback Speed, Cache Time
-  let playbackState: avSession.AVPlaybackState = {
-    state: avSession.PlaybackState.PLAYBACK_STATE_PLAY, // Playback status
-    position: {
-      elapsedTime: 1000, // The position that has been played, in ms
-      updateTime: new Date().getTime(), // The timestamp of when the app updated the current location, in ms
-    },
-    speed: 1.0, // Optional, the default is 1.0, the speed of playback, set according to the speed supported in the app, the system does not do verification
-    bufferedTime: 14000, // Optional, the time for which the resource is cached, in ms
-  };
-  session.setAVPlaybackState(playbackState, (err) => {
-    if (err) {
-      hilog.error(0x0000, 'Sample', `Failed to set AVPlaybackState. Code: ${err.code}, message: ${err.message}`);
-    } else {
-      hilog.info(0x0000, 'Sample', `SetAVPlaybackState successfully`);
-    }
-  });
+      // Set Status: Playback Status, Progress Position, Playback Speed, Cache Time
+      let playbackState: avSession.AVPlaybackState = {
+        state: avSession.PlaybackState.PLAYBACK_STATE_PLAY, // Playback status
+        position: {
+          elapsedTime: 1000, // The position that has been played, in ms
+          updateTime: new Date().getTime(), // The timestamp of when the app updated the current location, in ms
+        },
+        speed: 1.0, // Optional, the default is 1.0, the speed of playback, set according to the speed supported in the app, the system does not do verification
+        bufferedTime: 14000, // Optional, the time for which the resource is cached, in ms
+      };
+      session.setAVPlaybackState(playbackState, (err) => {
+        if (err) {
+          hilog.error(0x0000, 'Sample', `Failed to set AVPlaybackState. Code: ${err.code}, message: ${err.message}`);
+        } else {
+          hilog.info(0x0000, 'Sample', `SetAVPlaybackState successfully`);
+        }
+      });
+    })
+    .catch((err: BusinessError) => {
+      hilog.error(0x0000, 'Sample', `Failed to set createAVSession. Code: ${err.code}, message: ${err.message}`);
+    });
 }
 
 // [End setListener]
\ No newline at end of file
diff --git a/RationalUseOfFrontEndResources/entry/src/main/ets/pages/VideoScenesROMRule.ets b/RationalUseOfFrontEndResources/entry/src/main/ets/pages/VideoScenesROMRule.ets
index 29d9c9651f36fcb33de35aab60862c712cd30155..c53dc1fa06bdf407140014c9ee584c910158a74c 100644
--- a/RationalUseOfFrontEndResources/entry/src/main/ets/pages/VideoScenesROMRule.ets
+++ b/RationalUseOfFrontEndResources/entry/src/main/ets/pages/VideoScenesROMRule.ets
@@ -21,19 +21,28 @@ import { fileIo as fileIo } from '@kit.CoreFileKit';
 import { BusinessError } from '@kit.BasicServicesKit';
 import { hilog } from '@kit.PerformanceAnalysisKit';
 
-const pathDir = ""
+const pathDir = "";
 // [Start filePath]
 let filePath = pathDir + "/test.txt";
-let file = fileIo.openSync(filePath, fileIo.OpenMode.READ_WRITE | fileIo.OpenMode.CREATE);
 let str: string = "hello, world";
-// Use asynchronous methods to write files to the ROM
-fileIo.write(file.fd, str).then((writeLen: number) => {
-  hilog.info(0x0000, 'Sample', 'write data to file succeed and size is:' + writeLen);
-}).catch((err: BusinessError) => {
-  hilog.error(0x0000, 'Sample', 'write data to file failed with error message: ' + err.message + ', error code: ' + err.code);
-}).finally(() => {
-  fileIo.closeSync(file);
-});
+try {
+  let file = fileIo.openSync(filePath, fileIo.OpenMode.READ_WRITE | fileIo.OpenMode.CREATE);
+  // Use asynchronous methods to write files to the ROM
+  fileIo.write(file.fd, str)
+    .then((writeLen: number) => {
+      hilog.info(0x0000, 'Sample', 'write data to file succeed and size is:' + writeLen);
+    })
+    .catch((err: BusinessError) => {
+      hilog.error(0x0000, 'Sample',
+        'write data to file failed with error message: ' + err.message + ', error code: ' + err.code);
+    })
+    .finally(() => {
+      fileIo.closeSync(file);
+    });
+} catch (error) {
+  let err = error as BusinessError;
+  hilog.error(0x0000, 'Sample', `Failed to fileIo openSync, code=${err.code}, message=${err.message}`);
+}
 // [End filePath]