diff --git a/zh-cn/application-dev/reference/apis/js-apis-file-fs.md b/zh-cn/application-dev/reference/apis/js-apis-file-fs.md
index 78cf11ceb5a292138913d06b4131801f403d34af..8df713bbf5ad8bf9f55d040387ef9258af468e91 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-file-fs.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-file-fs.md
@@ -65,7 +65,7 @@ stat(file: string|number): Promise<Stat>
 **示例：**
 
   ```js
-  let filePath = pathDir + "test.txt";
+  let filePath = pathDir + "/test.txt";
   fs.stat(filePath).then((stat) => {
       console.info("get file info succeed, the size of file is " + stat.size);
   }).catch((err) => {
@@ -330,8 +330,8 @@ copyFile(src: string|number, dest: string|number, mode?: number): Promise<voi
 **示例：**
 
   ```js
-  let srcPath = pathDir + "srcDir/test.txt";
-  let dstPath = pathDir + "dstDir/test.txt";
+  let srcPath = pathDir + "/srcDir/test.txt";
+  let dstPath = pathDir + "/dstDir/test.txt";
   fs.copyFile(srcPath, dstPath).then(() => {
       console.info("copy file succeed");
   }).catch((err) => {
@@ -359,8 +359,8 @@ copyFile(src: string|number, dest: string|number, mode?: number, callback: Async
 **示例：**
 
   ```js
-  let srcPath = pathDir + "srcDir/test.txt";
-  let dstPath = pathDir + "dstDir/test.txt";
+  let srcPath = pathDir + "/srcDir/test.txt";
+  let dstPath = pathDir + "/dstDir/test.txt";
   fs.copyFile(srcPath, dstPath, (err) => {
     if (err) {
       console.info("copy file failed with error message: " + err.message + ", error code: " + err.code);
@@ -390,8 +390,8 @@ copyFileSync(src: string|number, dest: string|number, mode?: number): void
 **示例：**
 
   ```js
-  let srcPath = pathDir + "srcDir/test.txt";
-  let dstPath = pathDir + "dstDir/test.txt";
+  let srcPath = pathDir + "/srcDir/test.txt";
+  let dstPath = pathDir + "/dstDir/test.txt";
   fs.copyFileSync(srcPath, dstPath);
   ```
 
@@ -419,7 +419,7 @@ mkdir(path: string): Promise<void>
 **示例：**
 
   ```js
-  let dirPath = pathDir + '/testDir';
+  let dirPath = pathDir + "/testDir";
   fs.mkdir(dirPath).then(() => {
       console.info("mkdir succeed");
   }).catch((err) => {
@@ -446,7 +446,7 @@ mkdir(path: string, callback: AsyncCallback<void>): void
 **示例：**
 
   ```js
-  let dirPath = pathDir + '/testDir';
+  let dirPath = pathDir + "/testDir";
   fs.mkdir(dirPath, (err) => {
     if (err) {
       console.info("mkdir failed with error message: " + err.message + ", error code: " + err.code);
@@ -474,7 +474,7 @@ mkdirSync(path: string): void
 **示例：**
 
   ```js
-  let dirPath = pathDir + '/testDir';
+  let dirPath = pathDir + "/testDir";
   fs.mkdirSync(dirPath);
   ```
 
@@ -698,7 +698,7 @@ rmdir(path: string): Promise<void>
 **示例：**
 
   ```js
-  let dirPath = pathDir + '/testDir';
+  let dirPath = pathDir + "/testDir";
   fs.rmdir(dirPath).then(() => {
       console.info("rmdir succeed");
   }).catch((err) => {
@@ -725,7 +725,7 @@ rmdir(path: string, callback: AsyncCallback<void>): void
 **示例：**
 
   ```js
-  let dirPath = pathDir + '/testDir';
+  let dirPath = pathDir + "/testDir";
   fs.rmdir(dirPath, (err) => {
     if (err) {
       console.info("rmdir failed with error message: " + err.message + ", error code: " + err.code);
@@ -753,7 +753,7 @@ rmdirSync(path: string): void
 **示例：**
 
   ```js
-  let dirPath = pathDir + '/testDir';
+  let dirPath = pathDir + "/testDir";
   fs.rmdirSync(dirPath);
   ```
 
@@ -1235,7 +1235,7 @@ rename(oldPath: string, newPath: string): Promise<void>
 
   ```js
   let srcFile = pathDir + "/test.txt";
-  let dstFile = pathDir + '/new.txt';
+  let dstFile = pathDir + "/new.txt";
   fs.rename(srcFile, dstFile).then(() => {
       console.info("rename succeed");
   }).catch((err) => {
@@ -1263,7 +1263,7 @@ rename(oldPath: string, newPath: string, callback: AsyncCallback<void>): v
 
   ```js
   let srcFile = pathDir + "/test.txt";
-  let dstFile = pathDir + '/new.txt';
+  let dstFile = pathDir + "/new.txt";
   fs.rename(srcFile, dstFile, (err) => {
     if (err) {
       console.info("rename failed with error message: " + err.message + ", error code: " + err.code);
@@ -1292,7 +1292,7 @@ renameSync(oldPath: string, newPath: string): void
 
   ```js
   let srcFile = pathDir + "/test.txt";
-  let dstFile = pathDir + '/new.txt';
+  let dstFile = pathDir + "/new.txt";
   fs.renameSync(srcFile, dstFile);
   ```
 
@@ -1498,7 +1498,7 @@ symlink(target: string, srcPath: string): Promise<void>
 
   ```js
   let srcFile = pathDir + "/test.txt";
-  let dstFile = pathDir + '/test';
+  let dstFile = pathDir + "/test";
   fs.symlink(srcFile, dstFile).then(() => {
       console.info("symlink succeed");
   }).catch((err) => {
@@ -1526,7 +1526,7 @@ symlink(target: string, srcPath: string, callback: AsyncCallback<void>): v
 
   ```js
   let srcFile = pathDir + "/test.txt";
-  let dstFile = pathDir + '/test';
+  let dstFile = pathDir + "/test";
   fs.symlink(srcFile, dstFile, (err) => {
     if (err) {
       console.info("symlink failed with error message: " + err.message + ", error code: " + err.code);
@@ -1555,7 +1555,7 @@ symlinkSync(target: string, srcPath: string): void
 
   ```js
   let srcFile = pathDir + "/test.txt";
-  let dstFile = pathDir + '/test';
+  let dstFile = pathDir + "/test";
   fs.symlinkSync(srcFile, dstFile);
   ```
 
@@ -1733,8 +1733,8 @@ moveFile(src: string, dest: string, mode?: number): Promise<void>;
 **示例：**
 
   ```js
-  let srcPath = pathDir + '/source.txt';
-  let destPath = pathDir + '/dest.txt';
+  let srcPath = pathDir + "/source.txt";
+  let destPath = pathDir + "/dest.txt";
   fs.moveFile(srcPath, destPath, 0).then(() => {
       console.info("move file succeed");
   }).catch((err) => {
@@ -1762,8 +1762,8 @@ moveFile(src: string, dest: string, mode?: number, callback: AsyncCallback<void>
 **示例：**
 
   ```js
-  let srcPath = pathDir + '/source.txt';
-  let destPath = pathDir + '/dest.txt';
+  let srcPath = pathDir + "/source.txt";
+  let destPath = pathDir + "/dest.txt";
   fs.moveFile(srcPath, destPath, 0, (err) => {
     if (err) {
       console.info("move file failed with error message: " + err.message + ", error code: " + err.code);
@@ -1792,8 +1792,8 @@ moveFile(src: string, dest: string, mode?: number): void;
 **示例：**
 
   ```js
-  let srcPath = pathDir + '/source.txt';
-  let destPath = pathDir + '/dest.txt';
+  let srcPath = pathDir + "/source.txt";
+  let destPath = pathDir + "/dest.txt";
   fs.moveFileSync(srcPath, destPath, 0);
   console.info("move file succeed");
   ```