diff --git a/README.en.md b/README.en.md
index a11ef29898d8dccac121070e80b5a066894dba2b..ccdb41e6a3d44feef255d7cf4d385eee3afab4a7 100644
--- a/README.en.md
+++ b/README.en.md
@@ -32,5 +32,5 @@ N/A
 
 1. The sample is only supported on Huawei phones with standard systems.
 2. HarmonyOS: HarmonyOS 5.0.5 Release or later.
-3. DevEco Studio: DevEco Studio 5.0.5 Release or later.
-4. HarmonyOS SDK: HarmonyOS 5.0.5 Release SDK or later.
+3. DevEco Studio: DevEco Studio 6.0.0 Release or later.
+4. HarmonyOS SDK: HarmonyOS 6.0.0 Release SDK or later.
diff --git a/README.md b/README.md
index cfa5547b0c5aa8b9c08baf9f9a4e7ef08dad2372..7ebdf25a54eb3dce458a11ed6015085a28c23337 100644
--- a/README.md
+++ b/README.md
@@ -32,5 +32,5 @@
 
 1. 本示例仅支持标准系统上运行，支持设备：华为手机。
 2. HarmonyOS系统：HarmonyOS 5.0.5 Release及以上。
-3. DevEco Studio版本：DevEco Studio 5.0.5 Release及以上。
-4. HarmonyOS SDK版本：HarmonyOS 5.0.5 Release SDK及以上。
+3. DevEco Studio版本：DevEco Studio 6.0.0 Release及以上。
+4. HarmonyOS SDK版本：HarmonyOS 6.0.0 Release SDK及以上。
diff --git a/build-profile.json5 b/build-profile.json5
index 218d9c610f75e63401c65f00bda6b409b616de00..4dcb272d653aa2817f3dd34639de58d5236d81f9 100644
--- a/build-profile.json5
+++ b/build-profile.json5
@@ -7,7 +7,7 @@
         "name": "default",
         "signingConfig": "default",
         "compatibleSdkVersion": "5.0.5(17)",
-        "targetSdkVersion": "5.0.5(17)",
+        "targetSdkVersion": "6.0.0(20)",
         "runtimeOS": "HarmonyOS"
       }
     ]
diff --git a/entry/src/main/ets/common/database/PreferencesUtil.ets b/entry/src/main/ets/common/database/PreferencesUtil.ets
index 6d7cb585ba16b8bedd3400d0bf1765409cfbc3df..91300da08e43bcd57628b87cc121cbb66b82e25b 100644
--- a/entry/src/main/ets/common/database/PreferencesUtil.ets
+++ b/entry/src/main/ets/common/database/PreferencesUtil.ets
@@ -27,31 +27,31 @@ const KEY_APP_FONT_SIZE = 'appFontSize';
  */
 export class PreferencesUtil {
   createFontPreferences(context: Context) {
-    preferences.getPreferences(context, PREFERENCES_NAME).then((pref: preferences.Preferences) => {
+    try {
+      let pref = preferences.getPreferencesSync(context, { name: PREFERENCES_NAME });
       GlobalContext.getContext().setObject('getFontPreferences', pref);
-    }).catch((error: BusinessError) => {
-      Logger.error(TAG, `getPreferences err, code: ${error.code}, mesage: ${error.message}`);
-    })
+    } catch (err) {
+      let error = err as BusinessError;
+      Logger.error(TAG, `getPreferencesSync err, code: ${error.code}, mesage: ${error.message}`);
+    }
   }
 
   saveDefaultFontSize(fontSize: number) {
     try {
-      let getFontPreferences: Function = GlobalContext.getContext().getObject('getFontPreferences') as Function;
-      getFontPreferences().then((preferences: preferences.Preferences) => {
-        preferences.has(KEY_APP_FONT_SIZE).then(async (isExist: boolean) => {
-          Logger.info(TAG, 'preferences has changeFontSize is ' + isExist);
-          if (!isExist) {
-            await preferences.put(KEY_APP_FONT_SIZE, fontSize);
-            preferences.flush().catch((error: BusinessError) => {
-              Logger.error(TAG, `flush err, code: ${error.code}, mesage: ${error.message}`);
-            });
-          }
-        }).catch((err: Error) => {
-          Logger.error(TAG, 'Has the value failed with err: ' + err);
-        });
+      let fontPreferences: preferences.Preferences =
+        GlobalContext.getContext().getObject('getFontPreferences') as preferences.Preferences;
+      fontPreferences.has(KEY_APP_FONT_SIZE).then(async (isExist: boolean) => {
+        Logger.info(TAG, 'preferences has changeFontSize is ' + isExist);
+        if (!isExist) {
+          await fontPreferences.put(KEY_APP_FONT_SIZE, fontSize);
+          fontPreferences.flush().catch((error: BusinessError) => {
+            Logger.error(TAG, `flush err, code: ${error.code}, mesage: ${error.message}`);
+          });
+        }
       }).catch((err: Error) => {
-        Logger.error(TAG, 'Get the preferences failed, err: ' + err);
+        Logger.error(TAG, 'Has the value failed with err: ' + err);
       });
+
     } catch (err) {
       let error = err as BusinessError;
       Logger.error(TAG, `saveDefaultFontSize err, code: ${error.code}, mesage: ${error.message}`);
@@ -59,15 +59,12 @@ export class PreferencesUtil {
   }
 
   saveChangeFontSize(fontSize: number) {
-    let getFontPreferences: Function = GlobalContext.getContext().getObject('getFontPreferences') as Function;
+    let fontPreferences: preferences.Preferences =
+      GlobalContext.getContext().getObject('getFontPreferences') as preferences.Preferences;
     try {
-      getFontPreferences().then(async (preferences: preferences.Preferences) => {
-        await preferences.put(KEY_APP_FONT_SIZE, fontSize);
-        preferences.flush().catch((error: BusinessError) => {
-          Logger.error(TAG, `getFontPreferences err, code: ${error.code}, mesage: ${error.message}`);
-        });
-      }).catch((err: Error) => {
-        Logger.error(TAG, 'put the preferences failed, err: ' + err);
+      fontPreferences.putSync(KEY_APP_FONT_SIZE, fontSize);
+      fontPreferences.flush().catch((error: BusinessError) => {
+        Logger.error(TAG, `getFontPreferences err, code: ${error.code}, mesage: ${error.message}`);
       });
     } catch (err) {
       let error = err as BusinessError;
@@ -77,16 +74,21 @@ export class PreferencesUtil {
 
   async getChangeFontSize() {
     let fontSize: number = 16;
-    let getFontPreferences: Function = GlobalContext.getContext().getObject('getFontPreferences') as Function;
-    // const preferences: dataPreferences.Preferences = await getFontPreferences();
-    fontSize = await (await getFontPreferences()).get(KEY_APP_FONT_SIZE, fontSize);
+    let fontPreferences: preferences.Preferences =
+      GlobalContext.getContext().getObject('getFontPreferences') as preferences.Preferences;
+    try {
+      fontSize = fontPreferences.getSync(KEY_APP_FONT_SIZE, fontSize) as number;
+    } catch (err) {
+      let error = err as BusinessError;
+      Logger.error(TAG, `fontPreferences getSync, code: ${error.code}, mesage: ${error.message}`);
+    }
     return fontSize;
   }
 
   async deleteChangeFontSize() {
-    let getFontPreferences: Function = GlobalContext.getContext().getObject('getFontPreferences') as Function;
-    const preferences: preferences.Preferences = await getFontPreferences();
-    let deleteValue = preferences.delete(KEY_APP_FONT_SIZE).catch((error: BusinessError) => {
+    let fontPreferences: preferences.Preferences =
+      GlobalContext.getContext().getObject('getFontPreferences') as preferences.Preferences;
+    let deleteValue = fontPreferences.delete(KEY_APP_FONT_SIZE).catch((error: BusinessError) => {
       Logger.error(TAG, `delete err, code: ${error.code}, mesage: ${error.message}`);
     });
     deleteValue.then(() => {
diff --git a/entry/src/main/ets/entryability/EntryAbility.ets b/entry/src/main/ets/entryability/EntryAbility.ets
index 241058339cea9d0277f3e05455f2b0b03d5421ac..d11737b5e8e21c9b929665a7395da6a10a4f251b 100644
--- a/entry/src/main/ets/entryability/EntryAbility.ets
+++ b/entry/src/main/ets/entryability/EntryAbility.ets
@@ -29,10 +29,8 @@ const TAG = '[entryAbility]';
 export default class EntryAbility extends UIAbility {
   onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
     Logger.info(TAG, 'onCreate');
-    GlobalContext.getContext().setObject('abilityWant', want);
-
     PreferencesUtil.createFontPreferences(this.context);
-    // 设置字体默认大小
+    // Set default font size
     PreferencesUtil.saveDefaultFontSize(CommonConstants.SET_SIZE_NORMAL);
   }