diff --git a/zh-cn/application-dev/application-models/api-switch-overview.md b/zh-cn/application-dev/application-models/api-switch-overview.md
index 2500e9836013272202446b113a32844cf5c7988f..2b01a31f2d03fdcebdf514dfb32668a56e6b4f49 100644
--- a/zh-cn/application-dev/application-models/api-switch-overview.md
+++ b/zh-cn/application-dev/application-models/api-switch-overview.md
@@ -29,6 +29,7 @@ startAbility接口由FA模型切换到Stage模型的示例：
 
   ```ts
   import Want from '@ohos.app.ability.Want';
+  import { BusinessError } from '@ohos.base';
 
   // context为Ability对象的成员，在非Ability对象内部调用需要
   // 将Context对象传递过去
diff --git a/zh-cn/application-dev/application-models/pageability-switch.md b/zh-cn/application-dev/application-models/pageability-switch.md
index aa48ea13032bd4f720c86d392c9985c734827038..f24907aed4ff8d2b31223ca478f81825b5e574d7 100644
--- a/zh-cn/application-dev/application-models/pageability-switch.md
+++ b/zh-cn/application-dev/application-models/pageability-switch.md
@@ -42,7 +42,8 @@ FA模型中PageAbility对应Stage模型中的UIAbility。切换步骤如下。
 
 
    ```ts
-    import Window from '@ohos.window'
+    import Window from '@ohos.window';
+    import UIAbility from '@ohos.app.ability.UIAbility';
 
     export default class EntryAbility extends UIAbility {
       onWindowStageCreate(windowStage: Window.WindowStage) {
diff --git a/zh-cn/application-dev/application-models/start-page.md b/zh-cn/application-dev/application-models/start-page.md
index 492a503db165e16e10d023c8fa296c3d13a0926a..bdbe2e2bb998c7903f213181782edea90d14f901 100644
--- a/zh-cn/application-dev/application-models/start-page.md
+++ b/zh-cn/application-dev/application-models/start-page.md
@@ -135,7 +135,6 @@ struct Index {
             console.info("startAbility failed errcode:" + err.code)
           })
         })
-      ...
       Button("page2")
         .onClick(() => {
           featureAbility.startAbility({
@@ -150,9 +149,7 @@ struct Index {
             console.info("startAbility failed errcode:" + err.code)
           })
         })
-      ...
     }
-    ...
   }
 }
 ```