diff --git a/api/@ohos.application.Ability.d.ts b/api/@ohos.application.Ability.d.ts
index 7395dc55cfdb839cb3726c2703db164a6b31fbaf..2d55405568646bd90e1e140f2b2f42b7bc677508 100644
--- a/api/@ohos.application.Ability.d.ts
+++ b/api/@ohos.application.Ability.d.ts
@@ -16,6 +16,7 @@
 import AbilityContext from "./application/AbilityContext";
 import Want from './@ohos.application.Want';
 import window from './@ohos.window';
+import { Configuration } from './@ohos.application.Configuration';
 
 /**
  * The class of an ability.
@@ -119,6 +120,27 @@ export default class Ability {
      * @return true if ability agrees to migrate and saves data successfully, otherwise false.
      */
      onContinue(wantParam : {[key: string]: any}): boolean;
+
+    /**
+     * Called when the launch mode of an ability is set to singleton.
+     * This happens when you re-launch an ability that has been at the top of the ability stack.
+     *
+     * @devices phone, tablet, tv, wearable, car
+     * @since 8
+     * @sysCap AAFwk
+     * @return -
+     */
+    onNewWant(want: Want): void;
+
+     /**
+      * Called when the system configuration is updated.
+      *
+      * @devices phone, tablet, tv, wearable, car
+      * @since 8
+      * @sysCap AAFwk
+      * @return -
+      */
+    onConfigurationUpdated(config: Configuration): void;
 }
 
 export interface LaunchParam {
diff --git a/api/@ohos.application.AbilityStage.d.ts b/api/@ohos.application.AbilityStage.d.ts
index c552646d4980ee7fa48a93fe7b83788e8f7e859b..721a1c5731aaa64293e7a60825edd715e789bd98 100644
--- a/api/@ohos.application.AbilityStage.d.ts
+++ b/api/@ohos.application.AbilityStage.d.ts
@@ -14,6 +14,7 @@
  */
 
 import AbilityStageContext from "./application/AbilityStageContext";
+import Want from './@ohos.application.Want';
 
 /**
  * The class of an ability stage.
@@ -41,4 +42,14 @@ export default class AbilityStage {
      * @return -
      */
     onCreate(): void;
+
+    /**
+     * Called back when start specified ability.
+     *
+     * @devices phone, tablet, tv, wearable, car
+     * @since 8
+     * @sysCap AAFwk
+     * @return -
+     */
+    onAcceptWant(want: Want): string;
 }
\ No newline at end of file
diff --git a/api/application/AbilityContext.d.ts b/api/application/AbilityContext.d.ts
index 65a97c683e96d8ce99eae5237fd41da63a87fc6a..8d2e6b30f16fa616adaebb21093167d013884b1e 100644
--- a/api/application/AbilityContext.d.ts
+++ b/api/application/AbilityContext.d.ts
@@ -22,6 +22,7 @@ import Context from "./Context";
 import Want from "../@ohos.application.Want";
 import StartOptions from "../@ohos.application.StartOptions";
 import PermissionRequestResult from "./PermissionRequestResult";
+import { Configuration } from '../@ohos.application.Configuration';
 
 /**
  * The context of an ability. It allows access to ability-specific resources.
@@ -48,6 +49,14 @@ export default class AbilityContext extends Context {
      */
     currentHapModuleInfo: HapModuleInfo;
 
+    /**
+     * Indicates configuration information.
+     *
+     * @since 8
+     * @sysCap AAFwk
+     */
+    config: Configuration;
+
     /**
      * Starts a new ability.
      *