diff --git a/zh-cn/application-dev/quick-start/arkts-state.md b/zh-cn/application-dev/quick-start/arkts-state.md
index c1fd5dd5cd17569604028957edb6e96cd27d7ec9..857c1244f38335c55b84cb27ba85d5cea4494bde 100644
--- a/zh-cn/application-dev/quick-start/arkts-state.md
+++ b/zh-cn/application-dev/quick-start/arkts-state.md
@@ -296,5 +296,14 @@ struct MyComponent {
 2. 对于\@State来说，命名参数机制传递的值并不是必选的，如果没有命名参数传值，则使用本地初始化的默认值：
 
    ```ts
-   MyComponent({ count: 1, increaseBy: 2 })
+   class C1 {
+      public count:number;
+      public increaseBy:number;
+      constructor(count: number, increaseBy:number) {
+      this.count = count;
+      this.increaseBy = increaseBy;
+     }
+   }
+   let obj = new C1(1, 2)
+   MyComponent(obj)
    ```
diff --git a/zh-cn/application-dev/quick-start/har-package.md b/zh-cn/application-dev/quick-start/har-package.md
index 110559b41e9ae4659da13663b7f140d5080ec6e0..0dbf9a34fd1f68a5a54f5a9297c27fe2a29302cb 100644
--- a/zh-cn/application-dev/quick-start/har-package.md
+++ b/zh-cn/application-dev/quick-start/har-package.md
@@ -103,7 +103,7 @@ export { MainPage } from './src/main/ets/components/MainPage/MainPage'
 ```js
 // library/src/main/ts/test.ets
 export class Log {
-    static info(msg) {
+    static info(msg: string) {
         console.info(msg);
     }
 }
diff --git a/zh-cn/application-dev/reference/apis/js-apis-freeInstall.md b/zh-cn/application-dev/reference/apis/js-apis-freeInstall.md
index c97f538546fad141400dbc65f94ef961c0d8a483..acfcb76c08aa96b12d602f2bbcef74eb7c64c3ac 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-freeInstall.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-freeInstall.md
@@ -136,13 +136,14 @@ setHapModuleUpgradeFlag(bundleName: string, moduleName: string, upgradeFlag: Upg
 
 ```js
 import freeInstall from '@ohos.bundle.freeInstall';
+import { BusinessError } from '@ohos.base';
 let bundleName = 'com.example.myapplication';
 let moduleName = 'entry';
 let upgradeFlag = freeInstall.UpgradeFlag.SINGLE_UPGRADE;
 try {
     freeInstall.setHapModuleUpgradeFlag(bundleName, moduleName, upgradeFlag).then(() => {
         console.info('Operation succeed')
-    }).catch(err => {
+    }).catch((err: BusinessError) => {
         console.error('Operation failed:' + JSON.stringify(err));
     });
 } catch (err) {
@@ -236,12 +237,13 @@ isHapModuleRemovable(bundleName: string, moduleName: string): Promise\<boolean>;
 
 ```js
 import freeInstall from '@ohos.bundle.freeInstall';
+import { BusinessError } from '@ohos.base';
 let bundleName = 'com.example.myapplication';
 let moduleName = 'entry';
 try {
     freeInstall.isHapModuleRemovable(bundleName, moduleName).then(data => {
         console.info('Operation succeed:' + JSON.stringify(data));
-    }).catch(err => {
+    }).catch((err: BusinessError) => {
         console.error('Operation failed:' + JSON.stringify(err));
     });
 } catch (err) {
@@ -332,12 +334,13 @@ getBundlePackInfo(bundleName: string, bundlePackFlag : BundlePackFlag): Promise\
 
 ```js
 import freeInstall from '@ohos.bundle.freeInstall';
+import { BusinessError } from '@ohos.base';
 let bundleName = 'com.example.myapplication';
 let bundlePackFlag = freeInstall.BundlePackFlag.GET_PACK_INFO_ALL;
 try {
     freeInstall.getBundlePackInfo(bundleName, bundlePackFlag).then(data => {
         console.info('Operation succeed:' + JSON.stringify(data));
-    }).catch(err => {
+    }).catch((err: BusinessError) => {
         console.error('Operation failed:' + JSON.stringify(err));
     });
 } catch (err) {
@@ -402,10 +405,11 @@ getDispatchInfo(): Promise\<DispatchInfo>;
 
 ```js
 import freeInstall from '@ohos.bundle.freeInstall';
+import { BusinessError } from '@ohos.base';
 try {
     freeInstall.getDispatchInfo().then(data => {
         console.info('Operation succeed:' + JSON.stringify(data));
-    }).catch(err => {
+    }).catch((err: BusinessError) => {
         console.error('Operation failed:' + JSON.stringify(err));
     });
 } catch (err) {