diff --git a/en/application-dev/reference/apis/js-apis-audio.md b/en/application-dev/reference/apis/js-apis-audio.md
index a9eca8e2656bc76830215358751cee5af4000e63..b6dd66381e6d66072a4c56b3eafe91e92443b508 100644
--- a/en/application-dev/reference/apis/js-apis-audio.md
+++ b/en/application-dev/reference/apis/js-apis-audio.md
@@ -3058,7 +3058,6 @@ Reads the buffer from the audio capturer. This API uses an asynchronous callback
 audioCapturer.read(bufferSize, true, async(err, buffer) => {
     if (!err) {
         console.log("Success in reading the buffer data");
-        var number = fileio.writeSync(fd, buffer);
     }
 };
 ```
diff --git a/en/application-dev/reference/apis/js-apis-bluetooth.md b/en/application-dev/reference/apis/js-apis-bluetooth.md
index 9f8cef0aa5104d9d858ce559d78348fc2f88bf9e..f74e565b2d2dda5aa0421d5a7629e5fbee4dbdd5 100644
--- a/en/application-dev/reference/apis/js-apis-bluetooth.md
+++ b/en/application-dev/reference/apis/js-apis-bluetooth.md
@@ -1311,7 +1311,7 @@ Disconnects an A2DP connection.
 
 ```js
 let a2dpSrc = bluetooth.getProfile(PROFILE_A2DP_SOURCE);
-let boolean ret = a2dpSrc.disconnect('XX:XX:XX:XX:XX:XX');
+let ret = a2dpSrc.disconnect('XX:XX:XX:XX:XX:XX');
 ```
 
 
diff --git a/en/application-dev/reference/apis/js-apis-socket.md b/en/application-dev/reference/apis/js-apis-socket.md
index 34116c7c04b96f45167a8896710017851779d349..0f3a6ab7fb02dee588d22f92390a7ed6b731662e 100644
--- a/en/application-dev/reference/apis/js-apis-socket.md
+++ b/en/application-dev/reference/apis/js-apis-socket.md
@@ -563,7 +563,7 @@ Enables listening for error events of the UDPSocket connection. This API uses an
 **Example**
 
 ```
-let udp = socket.constructUDPSocketInstance()
+let udp = socket.constructUDPSocketInstance();
 udp.on('error', err => {
 	console.log("on error, err:" + JSON.stringify(err))
 });
@@ -591,7 +591,7 @@ Disables listening for error events of the UDPSocket connection. This API uses a
 **Example**
 
 ```
-let udp = socket.constructUDPSocketInstance()
+let udp = socket.constructUDPSocketInstance();
 let callback = err =>{
 	console.log("on error, err:" + JSON.stringify(err));
 }
diff --git a/zh-cn/application-dev/reference/apis/js-apis-audio.md b/zh-cn/application-dev/reference/apis/js-apis-audio.md
index 7e81b2e4387de54a2b3058095be3b8c7a7870a0c..da2ba881771d1be9002e9f4e180454aa9b45c9bf 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-audio.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-audio.md
@@ -3000,7 +3000,6 @@ read(size: number, isBlockingRead: boolean, callback: AsyncCallback<ArrayBuffer\
 audioCapturer.read(bufferSize, true, async(err, buffer) => {
     if (!err) {
         console.log("Success in reading the buffer data");
-        var number = fileio.writeSync(fd, buffer);
     }
 };
 ```
diff --git a/zh-cn/application-dev/reference/apis/js-apis-bluetooth.md b/zh-cn/application-dev/reference/apis/js-apis-bluetooth.md
index 1f205d828b37451048d1711e29942f2aed0b2379..d1e009e1ca54fa4755664a07117303e6e4ba0a22 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-bluetooth.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-bluetooth.md
@@ -1311,7 +1311,7 @@ disconnect(device: string): boolean
 
 ```js
 let a2dpSrc = bluetooth.getProfile(PROFILE_A2DP_SOURCE);
-let boolean ret = a2dpSrc.disconnect('XX:XX:XX:XX:XX:XX');
+let ret = a2dpSrc.disconnect('XX:XX:XX:XX:XX:XX');
 ```
 
 
diff --git a/zh-cn/application-dev/reference/apis/js-apis-socket.md b/zh-cn/application-dev/reference/apis/js-apis-socket.md
index 6af2ec2b8a1d15b26138970b3224d5691c2513eb..39b30fa679661918f640bd088cb9145fbc66f7f0 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-socket.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-socket.md
@@ -563,7 +563,7 @@ on\(type: 'error', callback: ErrorCallback\): void
 **示例：**
 
 ```
-let udp = socket.constructUDPSocketInstance()
+let udp = socket.constructUDPSocketInstance();
 udp.on('error', err => {
 	console.log("on error, err:" + JSON.stringify(err))
 });
@@ -591,7 +591,7 @@ off\(type: 'error', callback?: ErrorCallback\): void
 **示例：**
 
 ```
-let udp = socket.constructUDPSocketInstance()
+let udp = socket.constructUDPSocketInstance();
 let callback = err =>{
 	console.log("on error, err:" + JSON.stringify(err));
 }