diff --git a/en/release-notes/changelogs/v3.1-Release/changelogs-account_os_account.md b/en/release-notes/changelogs/v3.1-Release/changelogs-account_os_account.md
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+# Account Subsystem ChangeLog
+
+## cl.account_os_account.1 OsAccountInfo.type Value Type Change
+
+Changed the value type of **OsAccountInfo.type** from **Object** to **OsAccountType** enumeration.
+
+**Change Impacts**
+
+The mode for reading the **OsAccountInfo.type** value needs to be changed for the application developed based on earlier versions. Otherwise, the original service logic will be affected.
+
+**Key API/Component Changes**
+
+The following APIs are involved:
+- AccountManager
+  - queryAllCreatedOsAccounts(callback: AsyncCallback<Array<OsAccountInfo>>): void;
+  - queryAllCreatedOsAccounts(): Promise<Array<OsAccountInfo>>;
+  - createOsAccount(localName: string, type: OsAccountType, callback: AsyncCallback<OsAccountInfo>): void;
+  - createOsAccount(localName: string, type: OsAccountType): Promise<OsAccountInfo>;
+  - createOsAccountForDomain(type: OsAccountType, domainInfo: DomainAccountInfo, callback: AsyncCallback<OsAccountInfo>): void;
+  - createOsAccountForDomain(type: OsAccountType, domainInfo: DomainAccountInfo): Promise<OsAccountInfo>;
+  - queryCurrentOsAccount(callback: AsyncCallback<OsAccountInfo>): void;
+  - queryCurrentOsAccount(): Promise<OsAccountInfo>;
+  - getCurrentOsAccount(callback: AsyncCallback<OsAccountInfo>): void;
+  - getCurrentOsAccount(): Promise<OsAccountInfo>;
+  - queryOsAccountById(localId: number, callback: AsyncCallback<OsAccountInfo>): void;
+  - queryOsAccountById(localId: number): Promise<OsAccountInfo>;
+
+  - getOsAccountTypeFromProcess(callback: AsyncCallback<OsAccountType>): void;
+  - getOsAccountTypeFromProcess(): Promise<OsAccountType>;
+  - getOsAccountType(callback: AsyncCallback<OsAccountType>): void;
+  - getOsAccountType(): Promise<OsAccountType>;
+
+**Adaptation Guide**
+```ts
+import account_osAccount from "@ohos.account.osAccount"
+import { describe, beforeAll, beforeEach, afterEach, afterAll, it, expect } from '@ohos/hypium'
+
+let accountMgr = account_osAccount.getAccountManager();
+accountMgr.createOsAccount('account_test', account_osAccount.OsAccountType.GUEST).then((accountInfo) => {
+  expect(accountInfo.type).assertEqual(account_osAccount.OsAccountType.GUEST);
+  accountMgr.activateOsAccount(accountInfo.localId).then(() => {
+    console.log('activateOsAccount successfully');
+    accountMgr.getOsAccountTypeFromProcess().then((accountType) => {
+      expect(accountType).assertEqual(account_osAccount.OsAccountType.GUEST);
+    }).catch((err) => {
+      console.log('activateOsAccount err: ' + JSON.stringify(err));
+      expect().assertFail();
+    });
+  }).catch((err) => {
+    console.log('activateOsAccount err: ' + JSON.stringify(err));
+    expect().assertFail();
+  });
+}).catch((err) => {
+  console.log('createOsAccount err: ' + JSON.stringify(err));
+  expect().assertFail();
+});
+```