diff --git a/api/@ohos.application.Ability.d.ts b/api/@ohos.application.Ability.d.ts
index 130fd64dcdec5f4d48567799f396116ca74ea400..4c576857f04ec189cd7db42044782d69831ced6e 100644
--- a/api/@ohos.application.Ability.d.ts
+++ b/api/@ohos.application.Ability.d.ts
@@ -17,6 +17,7 @@ import AbilityConstant from "./@ohos.application.AbilityConstant";
 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.
@@ -131,4 +132,27 @@ export default class Ability {
      * @StageModelOnly
      */
      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 9
+     * @sysCap AAFwk
+     * @return -
+     * @StageModelOnly
+     */
+     onNewWant(want: Want): void;
+
+     /**
+      * Called when the system configuration is updated.
+      *
+      * @devices phone, tablet, tv, wearable, car
+      * @since 9
+      * @sysCap AAFwk
+      * @return -
+      * @StageModelOnly
+      */
+    onConfigurationUpdated(config: Configuration): void;
 }
diff --git a/api/@ohos.application.AbilityStage.d.ts b/api/@ohos.application.AbilityStage.d.ts
index 6d4c0d63ac623303f2e306c750d9c955dd8817d2..8857eb11d637d37adebfa3cc611b833d3cf4c2d3 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.
@@ -44,4 +45,15 @@ export default class AbilityStage {
      * @StageModelOnly
      */
     onCreate(): void;
+
+    /**
+     * Called back when start specified ability.
+     *
+     * @devices phone, tablet, tv, wearable, car
+     * @since 9
+     * @sysCap AAFwk
+     * @return -
+     * @StageModelOnly
+     */
+     onAcceptWant(want: Want): string;
 }
\ No newline at end of file
diff --git a/api/@ohos.application.StartOptions.d.ts b/api/@ohos.application.StartOptions.d.ts
index 41f6bd95d589146bb2e36aa4691a81e0fb43e3a1..ac8f6570b4041402fe14976f73654206fbf1d3e5 100644
--- a/api/@ohos.application.StartOptions.d.ts
+++ b/api/@ohos.application.StartOptions.d.ts
@@ -33,4 +33,14 @@ export default class StartOptions {
      * @StageModelOnly
      */
      windowMode?: number;
+
+    /**
+     * displayId
+     * @default -
+     * @devices phone, tablet
+     * @since 9
+     * @sysCap AAFwk
+     * @StageModelOnly
+     */
+    displayId?: number;
 }
\ No newline at end of file
diff --git a/api/@ohos.application.abilityManager.d.ts b/api/@ohos.application.abilityManager.d.ts
index 5f996d83664c5823d9867f1dadc36785a61a7346..c248195e16ebbc24e227036261e974142e0d0a60 100644
--- a/api/@ohos.application.abilityManager.d.ts
+++ b/api/@ohos.application.abilityManager.d.ts
@@ -62,7 +62,6 @@ declare namespace abilityManager {
      * @devices phone, tablet, tv, wearable, car
      * @since 8
      * @SysCap AAFwk
-     * @param config Indicates the new configuration.
      * @systemapi Hide this for inner system use.
      * @return -
      */
@@ -75,7 +74,7 @@ declare namespace abilityManager {
       * @devices phone, tablet, tv, wearable, car
       * @since 8
       * @SysCap AAFwk
-      * @param config Indicates the new configuration.
+      * @param upperLimit Get the maximum limit of the number of messages.
       * @systemapi Hide this for inner system use.
       * @return -
       */
diff --git a/api/application/AbilityContext.d.ts b/api/application/AbilityContext.d.ts
index 1757c2c771ab3cee867ccc44b8aadeff99afc0a2..2f977ff28f9d637633e4d36e6ba1ad45aa2ee8f5 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.
@@ -51,6 +52,15 @@ export default class AbilityContext extends Context {
      */
     currentHapModuleInfo: HapModuleInfo;
 
+    /**
+     * Indicates configuration information.
+     *
+     * @since 9
+     * @sysCap AAFwk
+     * @StageModelOnly
+     */
+    config: Configuration;
+
     /**
      * Starts a new ability.
      *