diff --git a/en/application-dev/dfx/apprecovery-guidelines.md b/en/application-dev/dfx/apprecovery-guidelines.md
index b2992e7c9958f0a1ffd87db9e4549bf0187bad78..bae804c558a57b61915760d37f46b73a03ebcf84 100644
--- a/en/application-dev/dfx/apprecovery-guidelines.md
+++ b/en/application-dev/dfx/apprecovery-guidelines.md
@@ -134,7 +134,7 @@ After the callback triggers **appRecovery.saveAppState()**, **onSaveState(state,
 
 - Restore data.
 
-After the callback triggers **appRecovery.restartApp()**, the application is restarted. After the restart, **onSaveState(state, wantParams)** of **MainAbility** is called, and the saved data is in **parameters** of **want**.
+After the callback triggers **appRecovery.restartApp()**, the application is restarted. After the restart, **onCreate(want, launchParam)** of **MainAbility** is called, and the saved data is in **parameters** of **want**.
 
 ```ts
 storage: LocalStorage
diff --git a/en/application-dev/dfx/errormanager-guidelines.md b/en/application-dev/dfx/errormanager-guidelines.md
index 631445b862097d5aa71320ff154d6e235660a95e..a43d7c1fcec9042c6d8cbeb1287cebdddd3915d1 100644
--- a/en/application-dev/dfx/errormanager-guidelines.md
+++ b/en/application-dev/dfx/errormanager-guidelines.md
@@ -37,10 +37,10 @@ When an asynchronous callback is used, the return value can be processed directl
 ## Development Example
 ```ts
 import Ability from '@ohos.application.Ability'
-import errorManager from '@ohos.application.errorManager'
+import errorManager from '@ohos.app.ability.errorManager';
 
-var registerId = -1;
-var callback = {
+let registerId = -1;
+let callback = {
     onUnhandledException: function (errMsg) {
         console.log(errMsg);
     }
@@ -48,13 +48,13 @@ var callback = {
 export default class MainAbility extends Ability {
     onCreate(want, launchParam) {
         console.log("[Demo] MainAbility onCreate")
-        registerId = errorManager.registerErrorObserver(callback);
+        registerId = errorManager.on("error", callback);
         globalThis.abilityWant = want;
     }
 
     onDestroy() {
         console.log("[Demo] MainAbility onDestroy")
-        errorManager.unregisterErrorObserver(registerId, (result) => {
+        errorManager.off("error", registerId, (result) => {
             console.log("[Demo] result " + result.code + ";" + result.message)
         });
     }
diff --git a/en/application-dev/reference/apis/js-apis-system-configuration.md b/en/application-dev/reference/apis/js-apis-system-configuration.md
index 934ceb020412a18c64499de1cb0ef1593ace2e50..ddc277722b452b8dca63eb50972d9d1f4448726d 100644
--- a/en/application-dev/reference/apis/js-apis-system-configuration.md
+++ b/en/application-dev/reference/apis/js-apis-system-configuration.md
@@ -50,4 +50,3 @@ Defines attributes of the current locale.
 | language | string | Yes   | No   | Language, for example, **zh**.|
 | countryOrRegion | string | Yes   | No   | Country or region, for example, **CN** or **US**.|
 | dir | string | Yes   | No   | Text layout direction. The value can be:<br>- **ltr**: from left to right<br>- **rtl**: from right to left|
-| unicodeSetting<sup>5+</sup> | string | Yes   | No   | Unicode language key set determined by the locale. If current locale does not have a specific key set, an empty set is returned.<br>For example, **{"nu":"arab"}** indicates that current locale uses Arabic numerals.|