diff --git a/en/release-notes/changelogs/OpenHarmony_4.0.9.5/changelogs-formfwk.md b/en/release-notes/changelogs/OpenHarmony_4.0.9.5/changelogs-formfwk.md
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+# formfwk Subsystem Changelog
+
+## cl.formfwk.1 Some APIs Moved from @ohos.app.form.formHost.d.ts and Their Permission Changed
+
+1. APIs used for listening for and obtaining dynamic widget information are moved from **@ohos.app.form.formHost.d.ts** to **@ohos.app.form.formObserver.d.ts**.
+
+2. The permission for these APIs is changed from **ohos.permission.REQUIRE_FORM** to **ohos.permission.OBSERVE_FORM_RUNNING**.
+
+**Change Impact**
+
+Applications that use the involved APIs may have compatibility issues.
+
+**Key API/Component Changes**
+
+|     API     | Home .d.ts File Before Modification| Home .d.ts File After Modification| Permission Required Before Modification| Permission Required After Modification|
+|   --------    |   --------    |   --------    | --------      | --------  |
+| on('formAdd') | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM|ohos.permission.OBSERVE_FORM_RUNNING|
+| off('formAdd')| @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM|ohos.permission.OBSERVE_FORM_RUNNING | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING |
+| on('formRemove') | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING |
+| off('formRemove') | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING |
+| on('notifyVisible') | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING |
+| off('notifyVisible') | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING |
+| on('notifyInvisible') | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING |
+| off('notifyInvisible') | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING |
+| getRunningFormInfos | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING |
+| getRunningFormInfosByFilter | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING |
+| getRunningFormInfoById | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING | @ohos.app.form.formHost.d.ts | @ohos.app.form.formObserver.d.ts | ohos.permission.REQUIRE_FORM | ohos.permission.OBSERVE_FORM_RUNNING |
+
+**Adaptation Guide**
+
+Adapt your application code accordingly. To use these APIs in OpenHarmony 4.0.9.5 and later versions, import **@ohos.app.form.formObserver.d.ts** and request the **ohos.permission.OBSERVE_FORM_RUNNING** permission.
+
+**Example**
+
+```js
+import formObserver from @ohos.app.form.formObserver.d.ts;
+
+try {
+  formObserver.getRunningFormInfos((error, data) => {
+    if (error) {
+      console.error(`error, code: ${error.code}, message: ${error.message}`);
+    } else {
+      console.log('formHost getRunningFormInfos, data: ${JSON.stringify(data)}');
+    }
+  }, 'com.example.ohos.formjsdemo');
+} catch(error) {
+  console.error(`catch error, code: ${error.code}, message: ${error.message}`);
+}
+```
+
+
+## cl.formfwk.2 Adjusted the Parameter Sequence of Event Subscription and Unsubscription APIs (on/off)
+
+The **callback** parameter is moved as the last parameter in the event subscription and unsubscription APIs (**on**/**off**).
+
+**Change Impact**
+
+Applications that use the involved APIs may have compatibility issues.
+
+**Key API/Component Changes**
+
+Before change:
+
+```js
+function on(type: 'formAdd', observerCallback: Callback<formInfo.RunningFormInfo>, bundleName?: string): void;
+function off(type: 'formAdd', observerCallback?: Callback<formInfo.RunningFormInfo>, bundleName?: string): void;
+
+function on(type: 'formRemove', observerCallback: Callback<formInfo.RunningFormInfo>, bundleName?: string): void;
+function off(type: 'formRemove', observerCallback?: Callback<formInfo.RunningFormInfo>, bundleName?: string): void;
+
+function on(
+    type: 'notifyVisible',
+    observerCallback: Callback<Array<formInfo.RunningFormInfo>>,
+    hostBundleName?: string
+  ): void;
+function off(
+    type: 'notifyVisible',
+    observerCallback?: Callback<Array<formInfo.RunningFormInfo>>,
+    hostBundleName?: string
+  ): void;
+
+function on(
+    type: 'notifyInvisible',
+    observerCallback: Callback<Array<formInfo.RunningFormInfo>>,
+    hostBundleName?: string
+  ): void;
+function off(
+    type: 'notifyInvisible',
+    observerCallback?: Callback<Array<formInfo.RunningFormInfo>>,
+    hostBundleName?: string
+  ): void;
+```
+
+After change:
+
+```js
+function on(type: 'formAdd', observerCallback: Callback<formInfo.RunningFormInfo>): void;
+function on(type: 'formAdd', hostBundleName: string, observerCallback: Callback<formInfo.RunningFormInfo>): void;
+function off(type: 'formAdd', hostBundleName?: string, observerCallback?: Callback<formInfo.RunningFormInfo>): void;
+
+function on(type: 'formRemove', observerCallback: Callback<formInfo.RunningFormInfo>): void;
+function on(type: 'formRemove', hostBundleName: string, observerCallback: Callback<formInfo.RunningFormInfo>): void;
+function off(type: 'formRemove', hostBundleName?: string, observerCallback?: Callback<formInfo.RunningFormInfo>): void;
+
+function on(type: 'notifyVisible', observerCallback: Callback<Array<formInfo.RunningFormInfo>>): void;
+function on(
+    type: 'notifyVisible',
+    hostBundleName: string,
+    observerCallback: Callback<Array<formInfo.RunningFormInfo>>
+  ): void;
+function off(
+    type: 'notifyVisible',
+    hostBundleName?: string,
+    observerCallback?: Callback<Array<formInfo.RunningFormInfo>>
+  ): void;
+
+function on(type: 'notifyInvisible', observerCallback: Callback<Array<formInfo.RunningFormInfo>>): void;
+function on(
+    type: 'notifyInvisible',
+    hostBundleName: string,
+    observerCallback: Callback<Array<formInfo.RunningFormInfo>>,
+  ): void;
+function off(
+    type: 'notifyInvisible',
+    hostBundleName?: string,
+    observerCallback?: Callback<Array<formInfo.RunningFormInfo>>
+  ): void;
+```
+
+**Adaptation Guide**
+
+Adapt your application code accordingly. In OpenHarmony 4.0.9.5 and later versions, pass in **callback** as the last parameter when calling these APIs.
+
+**Example**
+
+```js
+import formObserver from @ohos.app.form.formObserver.d.ts;
+
+let bundleName = 'ohos.samples.FormApplication';
+let callback = function(data) {
+  console.log('a new form added, data: ${JSON.stringify(data)');
+}
+
+formHost.on('formAdd', callback);
+formHost.on('formAdd', bundleName, callback);
+```