diff --git a/ArkUI/Lazy_Loading_Optimizes_Performance/entry/src/main/ets/pages/Index.ets b/ArkUI/Lazy_Loading_Optimizes_Performance/entry/src/main/ets/pages/Index.ets
index 8e2d24ad42693fc877d51bb7820f0a9da68fa135..bfb9190d4b26c6248dea78b6da3eddc37dde5389 100644
--- a/ArkUI/Lazy_Loading_Optimizes_Performance/entry/src/main/ets/pages/Index.ets
+++ b/ArkUI/Lazy_Loading_Optimizes_Performance/entry/src/main/ets/pages/Index.ets
@@ -1,10 +1,35 @@
+import { MyDataSource } from '../segment/segment1';
+
 @Entry
 @Component
 struct Index {
   @State message: string = 'Hello World';
+  private data: MyDataSource = new MyDataSource();
 
   build() {
     RelativeContainer() {
+      // [Start cached_count_list]
+      List() {
+        // ...
+      }.cachedCount(3)
+      // [End cached_count_list]
+
+      // [Start Lazy_for_each]
+      LazyForEach(this.data, (lazyForEachItem: string) => {
+        ListItem() {
+          Row() {
+            Text(lazyForEachItem).fontSize(50)
+          }.margin({ left: 10, right: 10 })
+        }.onAppear(() => {
+          // Record the number of times the component is created through onAppear
+          console.info("appear:" + lazyForEachItem)
+        })
+      }, (item: string) => {
+        // Print the key value in the keyGenerator function
+        console.info("key:" + item)
+        return item;
+      })
+      // [End Lazy_for_each]
       Text(this.message)
         .id('HelloWorld')
         .fontSize($r('app.float.page_text_font_size'))
diff --git a/ArkUI/Lazy_Loading_Optimizes_Performance/entry/src/main/ets/segment/segment1.ets b/ArkUI/Lazy_Loading_Optimizes_Performance/entry/src/main/ets/segment/segment1.ets
index f558239c7b5407fb4954b293b83fe81ff7319709..9e4d040a9985112dee42ca0a53190def24ef235a 100644
--- a/ArkUI/Lazy_Loading_Optimizes_Performance/entry/src/main/ets/segment/segment1.ets
+++ b/ArkUI/Lazy_Loading_Optimizes_Performance/entry/src/main/ets/segment/segment1.ets
@@ -9,7 +9,7 @@ interface DataChangeListener {
 }
 
 
-class MyDataSource {
+export class MyDataSource {
   private _data: string[] = [];
   private _listeners: DataChangeListener[] = [];