diff --git a/entry/src/main/ets/application/MailBox.ets b/entry/src/main/ets/application/MailBox.ets
index 3399782f3446122dd87b2abb8ace0f4149ef719f..2406b1924026c96bd933204317f0a61d5ebd1d51 100644
--- a/entry/src/main/ets/application/MailBox.ets
+++ b/entry/src/main/ets/application/MailBox.ets
@@ -28,10 +28,8 @@ struct MailBox {
 
   // [Start set_show_side_bar_build]
   build() {
-    // [StartExclude set_show_side_bar_build]
     GridRow() {
       GridCol({ span: { sm: 12, md: 12, lg: 12 } }) {
-        // [EndExclude set_show_side_bar_build]
         // [Start set_show_side_bar]
         SideBarContainer(SideBarContainerType.AUTO) {
           // Area A
@@ -46,13 +44,11 @@ struct MailBox {
           Column() {
             Stack() {
               MailNavigation()
-              // [StartExclude set_show_side_bar_build]
               // [StartExclude set_show_side_bar]
               if (this.isFold && this.currentBreakPoint !== 'lg') {
                 Column().width('100%').height('100%').backgroundColor('#33000000')
               }
               // [EndExclude set_show_side_bar]
-              // [EndExclude set_show_side_bar_build]
             }
           }
           .height('100%')
@@ -68,8 +64,11 @@ struct MailBox {
         .onChange((value: boolean) => {
           this.isFold = value;
         })
+        // [EndExclude set_show_side_bar_build]
       }
-    }.onBreakpointChange((breakpoint: string) => {
+    }
+    // [StartExclude set_show_side_bar_build]
+    .onBreakpointChange((breakpoint: string) => {
       this.currentBreakPoint = breakpoint;
     })
     // [EndExclude set_show_side_bar_build]