diff --git a/en/application-dev/application-models/uiability-lifecycle.md b/en/application-dev/application-models/uiability-lifecycle.md
index 9ec701cbffd4da51098d5dc448addd88f26ee47e..57200abb8fbfb625e2e6c8999da5ad817e2e85b4 100644
--- a/en/application-dev/application-models/uiability-lifecycle.md
+++ b/en/application-dev/application-models/uiability-lifecycle.md
@@ -7,8 +7,9 @@ When a user opens, switches, and returns to an application, the UIAbility instan
The lifecycle of UIAbility has four states: **Create**, **Foreground**, **Background**, and **Destroy**, as shown in the figure below.
-**Figure 1** UIAbility lifecycle states
-
+**Figure 1** UIAbility lifecycle states
+
+
## Description of Lifecycle States
@@ -36,8 +37,9 @@ export default class EntryAbility extends UIAbility {
After the UIAbility instance is created but before it enters the **Foreground** state, the system creates a WindowStage instance and triggers the **onWindowStageCreate()** callback. You can set UI loading and WindowStage event subscription in the callback.
-**Figure 2** WindowStageCreate and WindowStageDestory
-
+**Figure 2** WindowStageCreate and WindowStageDestory
+
+
In the **onWindowStageCreate()** callback, use [loadContent()](../reference/apis/js-apis-window.md#loadcontent9-2) to set the page to be loaded, and call [on('windowStageEvent')](../reference/apis/js-apis-window.md#onwindowstageevent9) to subscribe to [WindowStage events](../reference/apis/js-apis-window.md#windowstageeventtype9), for example, having or losing focus, or becoming visible or invisible.