diff --git a/api/@ohos.app.ability.AbilityStage.d.ts b/api/@ohos.app.ability.AbilityStage.d.ts
index a4e2ace68edb7c1c1b666b49ca1c210d79627f16..17e5201b46905b23750bd2d021e85276449e6736 100644
--- a/api/@ohos.app.ability.AbilityStage.d.ts
+++ b/api/@ohos.app.ability.AbilityStage.d.ts
@@ -166,10 +166,24 @@ export default class AbilityStage {
    * @stagemodelonly
    * @since 11
    */
+  /**
+   * Called when UIAbility or configured with the isolationProcess field UIExtensionAbility in the specified process is started.
+   * 
+   * <p>**NOTE**:
+   * <br>This API returns the result synchronously and does not support asynchronous callbacks.
+   * </p>
+   *
+   * @param { Want } want - Want information about the target ability, such as the ability name and bundle name.
+   * @returns { string } Custom process identifier. If the process with this identifier has been created, the ability
+   * runs in the process. Otherwise, a new process is created and the ability runs in it.
+   * @syscap SystemCapability.Ability.AbilityRuntime.Core
+   * @stagemodelonly
+   * @since 20
+   */
   onNewProcessRequest(want: Want): string;
 
   /**
-  * Called back asynchronously upon starting UIAbility in specified process.
+  * Called back asynchronously upon starting UIAbility or UIExtensionAbility in specified process.
   *
   * @param { Want } want - Indicates the want info of the started ability.
   * @returns { Promise<string> }  The user returns an ability string ID. If the ability of this ID has been started before,