diff --git a/zh-cn/application-dev/quick-start/arkts-prop.md b/zh-cn/application-dev/quick-start/arkts-prop.md
index 171f1fb43bd8ef6eff28e32e642c89e73037743f..fe4f7ebda442a59c915b26f90b56620220d5583b 100644
--- a/zh-cn/application-dev/quick-start/arkts-prop.md
+++ b/zh-cn/application-dev/quick-start/arkts-prop.md
@@ -419,7 +419,7 @@ class Book {
 
 @Component
 struct ReaderComp {
-  @Prop book: Book;
+  @Prop book: Book = new Book("", 1);
 
   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: Book) => {
         ReaderComp({ book: book })
       },
-        book => book.id)
+        (book: Book) => book.id.toString())
       Button('Add new')
         .onClick(() => {
           this.allBooks.push(new Book("The C++ Standard Library", 512));
@@ -579,6 +579,26 @@ class ClassB {
 以下组件层次结构呈现的是@Prop嵌套场景的数据结构。
 
 ```ts
+// 以下是嵌套类对象的数据结构。
+@Observed
+class ClassA {
+  public title: string;
+
+  constructor(title: string) {
+    this.title = title;
+  }
+}
+
+@Observed
+class ClassB {
+  public name: string;
+  public a: ClassA;
+
+  constructor(name: string, a: ClassA) {
+    this.name = name;
+    this.a = a;
+  }
+}
 
 @Entry
 @Component
@@ -588,10 +608,10 @@ struct Parent {
   build() {
     Column() {
       Button('change')
-      .onClick(() => {
-        this.votes.name = "aaaaa"
-        this.votes.a.title = "wwwww"
-      })
+        .onClick(() => {
+          this.votes.name = "aaaaa"
+          this.votes.a.title = "wwwww"
+        })
       Child({ vote: this.votes })
     }
 
@@ -600,33 +620,33 @@ struct Parent {
 
 @Component
 struct Child {
-  @Prop vote: ClassB
+  @Prop vote: ClassB = new ClassB('', new ClassA(''));
   build() {
-  Column() {
+    Column() {
 
-    Text(this.vote.name).fontSize(36).fontColor(Color.Red).margin(50)
-      .onClick(() => {
-        this.vote.name = 'Bye'
-      })
-    Text(this.vote.a.title).fontSize(36).fontColor(Color.Blue)
-      .onClick(() => {
-        this.vote.a.title = "openHarmony"
-      })
-    Child1({vote1:this.vote.a})
+      Text(this.vote.name).fontSize(36).fontColor(Color.Red).margin(50)
+        .onClick(() => {
+          this.vote.name = 'Bye'
+        })
+      Text(this.vote.a.title).fontSize(36).fontColor(Color.Blue)
+        .onClick(() => {
+          this.vote.a.title = "openHarmony"
+        })
+      Child1({vote1:this.vote.a})
 
-  }
+    }
   }
 }
 
 @Component
 struct Child1 {
-  @Prop vote1: ClassA
+  @Prop vote1: ClassA = new ClassA('');
   build() {
     Column() {
-    Text(this.vote1.title).fontSize(36).fontColor(Color.Red).margin(50)
-    .onClick(() => {
-      this.vote1.title = 'Bye Bye'
-    })
+      Text(this.vote1.title).fontSize(36).fontColor(Color.Red).margin(50)
+        .onClick(() => {
+          this.vote1.title = 'Bye Bye'
+        })
     }
   }
 }