diff --git a/zh-cn/application-dev/file-management/medialibrary-filepath-guidelines.md b/zh-cn/application-dev/file-management/medialibrary-filepath-guidelines.md
index 9c6475e65ea02b0e62a3eb4578c1a81921eab6d6..562ae00767b674be4423014cf1970b4759da5204 100644
--- a/zh-cn/application-dev/file-management/medialibrary-filepath-guidelines.md
+++ b/zh-cn/application-dev/file-management/medialibrary-filepath-guidelines.md
@@ -173,7 +173,7 @@ async function example() {
   const context = getContext(this);
   let media = mediaLibrary.getMediaLibrary(context);
   const path = await media.getPublicDirectory(DIR_DOCUMENTS);
-  media.createAsset(mediaType, "testFile.text", path).then((asset) => {
+  media.createAsset(mediaType, "testFile.txt", path).then((asset) => {
     console.info("createAsset successfully:" + JSON.stringify(asset));
   }).catch((err) => {
     console.error("createAsset failed with error: " + err);
diff --git a/zh-cn/application-dev/file-management/medialibrary-resource-guidelines.md b/zh-cn/application-dev/file-management/medialibrary-resource-guidelines.md
index f7ff385787524cb3209c2cc3b54bc427f84ca8b2..3d87b249e9d8b785b833f8cbd6f471f97f85b152 100644
--- a/zh-cn/application-dev/file-management/medialibrary-resource-guidelines.md
+++ b/zh-cn/application-dev/file-management/medialibrary-resource-guidelines.md
@@ -42,14 +42,11 @@ async function example() {
   const context = getContext(this);
   let media = mediaLibrary.getMediaLibrary(context);
   const fetchFileResult = await media.getFileAssets(option);
-  fetchFileResult.getFirstObject().then((fileAsset) => {
+  fetchFileResult.getFirstObject().then(async (fileAsset) => {
     console.log('getFirstObject.displayName : ' + fileAsset.displayName);
     for (let i = 1; i < fetchFileResult.getCount(); i++) {
-      fetchFileResult.getNextObject().then((fileAsset) => {
-        console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
-      }).catch((err) => {
-        console.error('Failed to get next object: ' + err);
-      });
+      let fileAsset = await fetchFileResult.getNextObject();
+      console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
     }
   }).catch((err) => {
     console.error('Failed to get first object: ' + err);
@@ -75,14 +72,11 @@ async function example() {
   const context = getContext(this);
   let media = mediaLibrary.getMediaLibrary(context);
   const fetchFileResult = await media.getFileAssets(option);
-  fetchFileResult.getFirstObject().then((fileAsset) => {
+  fetchFileResult.getFirstObject().then(async (fileAsset) => {
     console.info('getFirstObject.displayName : ' + fileAsset.displayName);
     for (let i = 1; i < fetchFileResult.getCount(); i++) {
-      fetchFileResult.getNextObject().then((fileAsset) => {
-        console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
-      }).catch((err) => {
-        console.error('Failed to get next object: ' + err);
-      });
+      let fileAsset = await fetchFileResult.getNextObject();
+      console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
     }
   }).catch((err) => {
     console.error('Failed to get first object: ' + err);
@@ -92,7 +86,7 @@ async function example() {
 
 ### 按指定顺序排列
 
-下面以查询图片并按文件添加日期降序排列为例。实际开发中可以设置升序（AESC）和降序（DESC）。
+下面以查询图片并按文件添加日期降序排列为例。实际开发中可以设置升序（ASC）和降序（DESC）。
 
 order： FileKey.DATE_ADDED，根据文件添加日期排序；并设置排列顺序为DESC降序。
 
@@ -108,14 +102,11 @@ async function example() {
   const context = getContext(this);
   let media = mediaLibrary.getMediaLibrary(context);
   const fetchFileResult = await media.getFileAssets(option);
-  fetchFileResult.getFirstObject().then((fileAsset) => {
+  fetchFileResult.getFirstObject().then(async (fileAsset) => {
     console.info('getFirstObject.displayName : ' + fileAsset.displayName);
     for (let i = 1; i < fetchFileResult.getCount(); i++) {
-      fetchFileResult.getNextObject().then((fileAsset) => {
-        console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
-      }).catch((err) => {
-        console.error('Failed to get next object: ' + err);
-      });
+      let fileAsset = await fetchFileResult.getNextObject();
+      console.info('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
     }
   }).catch((err) => {
     console.error('Failed to get first object: ' + err);