diff --git a/zh-cn/application-dev/quick-start/arkts-extend.md b/zh-cn/application-dev/quick-start/arkts-extend.md
index 21bf4183188bed49b86b18cd1ad87690c07e70c0..cfea43912c423e5ec55860cae8ebc0b7d8a500d7 100644
--- a/zh-cn/application-dev/quick-start/arkts-extend.md
+++ b/zh-cn/application-dev/quick-start/arkts-extend.md
@@ -64,27 +64,27 @@
 - \@Extend装饰的方法的参数可以为function，作为Event事件的句柄。
 
   ```ts
-@Extend(Text) function makeMeClick(onClick: () => void) {
-  .backgroundColor(Color.Blue)
-  .onClick(onClick)
-}
+  @Extend(Text) function makeMeClick(onClick: () => void) {
+    .backgroundColor(Color.Blue)
+    .onClick(onClick)
+  }
 
-@Entry
-@Component
-struct FancyUse {
-  @State label: string = 'Hello World';
+  @Entry
+  @Component
+  struct FancyUse {
+    @State label: string = 'Hello World';
 
-  onClickHandler() {
-    this.label = 'Hello ArkUI';
-  }
+    onClickHandler() {
+      this.label = 'Hello ArkUI';
+    }
 
-  build() {
-    Row({ space: 10 }) {
-      Text(`${this.label}`)
-        .makeMeClick(this.onClickHandler.bind(this))
+    build() {
+      Row({ space: 10 }) {
+        Text(`${this.label}`)
+          .makeMeClick(this.onClickHandler)
+      }
     }
   }
-}
   ```
 
 - \@Extend的参数可以为[状态变量](arkts-state-management-overview.md)，当状态变量改变时，UI可以正常的被刷新渲染。
diff --git a/zh-cn/application-dev/quick-start/arkts-observed-and-objectlink.md b/zh-cn/application-dev/quick-start/arkts-observed-and-objectlink.md
index 538c27e9e0787af8ced563bef4f0076b6e856b1b..e4c7838e12ec0ce594ea78ebcbaaf1a9732f4eb6 100644
--- a/zh-cn/application-dev/quick-start/arkts-observed-and-objectlink.md
+++ b/zh-cn/application-dev/quick-start/arkts-observed-and-objectlink.md
@@ -346,7 +346,7 @@ struct ViewB {
         (item: ClassA) => {
           ViewA({ label: `#${item.id}`, a: item })
         },
-        (item: ClassA) => item.id.toString()
+        (item: ClassA): string => item.id.toString()
       )
       // 使用@State装饰的数组的数组项初始化@ObjectLink，其中数组项是被@Observed装饰的ClassA的实例
       ViewA({ label: `ViewA this.arrA[first]`, a: this.arrA[0] })
diff --git a/zh-cn/application-dev/quick-start/arkts-prop.md b/zh-cn/application-dev/quick-start/arkts-prop.md
index 330451992d554ab90108adf749ae1f3095bb2657..0d576e7305758c1d3446ae16c93dcf1933f52511 100644
--- a/zh-cn/application-dev/quick-start/arkts-prop.md
+++ b/zh-cn/application-dev/quick-start/arkts-prop.md
@@ -264,7 +264,7 @@ struct ParentComponent {
 ```ts
 @Component
 struct Child {
-  @Prop value: number;
+  @Prop value: number = 0;
 
   build() {
     Text(`${this.value}`)
@@ -288,10 +288,10 @@ struct Index {
         Divider().height(5)
 
         ForEach(this.arr, 
-          item => {
+          (item: void) => {
             Child({value: item})
           }, 
-          item => item.toString()
+          (item: string) => item.toString()
         )
         Text('replace entire arr')
         .fontSize(50)
@@ -419,7 +419,7 @@ class Book {
 
 @Component
 struct ReaderComp {
-  @Prop book: Book;
+  @Prop book: Book = new Book();
 
   build() {
     Row() {
@@ -442,10 +442,10 @@ struct Library {
       ReaderComp({ book: this.allBooks[2] })
       Divider()
       Text('Books on loaan to a reader')
-      ForEach(this.allBooks, book => {
+      ForEach(this.allBooks, (book: void) => {
         ReaderComp({ book: book })
       },
-        book => book.id)
+        (book: number): number => book.id)
       Button('Add new')
         .onClick(() => {
           this.allBooks.push(new Book("The C++ Standard Library", 512));
diff --git a/zh-cn/application-dev/quick-start/arkts-rendering-control-best-practices.md b/zh-cn/application-dev/quick-start/arkts-rendering-control-best-practices.md
index 5afba0367e9bf5c41c6d9c168faa95083e9d9faf..1b63c2c9a6872f991794d39f3d88dae16e7d61e6 100644
--- a/zh-cn/application-dev/quick-start/arkts-rendering-control-best-practices.md
+++ b/zh-cn/application-dev/quick-start/arkts-rendering-control-best-practices.md
@@ -22,10 +22,10 @@ struct Index {
   build() {
       Column() {
        ForEach(this.arr,
-         (item) => {
+         (item: void) => {
            Text(`Item ${item}`)
          },
-         item => item.toString())
+         (item: string) => item.toString())
        Text('Add arr element')
          .fontSize(20)
          .onClick(()=>{
@@ -61,7 +61,7 @@ ForEach数据源更新时，数组项ID与原数组项ID重复不会重新创建
 ```ts
 @Component
 struct Child {
-  @Prop value: number;
+  @Prop value: number = 0;
   build() {
     Text(`${this.value}`)
       .fontSize(50)
@@ -83,10 +83,10 @@ struct Index {
         Child({ value: this.arr[2] })
         Divider().height(5)
         ForEach(this.arr,
-          item => {
+          (item: number) => {
             Child({ value: item })
           },
-          item => item.toString()  // 键值，标识id
+          (item: string) => item.toString()  // 键值，标识id
         )
         Text('Parent: replace entire arr')
           .fontSize(50)