diff --git a/lib/JsonResult/PrivateMessagePortalResult.dart b/lib/JsonResult/PrivateMessagePortalResult.dart
index 0974651..ba4c72e 100644
--- a/lib/JsonResult/PrivateMessagePortalResult.dart
+++ b/lib/JsonResult/PrivateMessagePortalResult.dart
@@ -17,6 +17,7 @@ class PrivateMessagePortalResult extends BaseResult{
   PrivateMessagePortalResult(){}
 
   factory PrivateMessagePortalResult.fromJson(Map<String, dynamic> json) => _$PrivateMessagePortalResultFromJson(json);
+  Map<String, dynamic> toJson() => _$PrivateMessagePortalResultToJson(this);
 }
 
 @JsonSerializable()
@@ -33,7 +34,7 @@ class PrivateMessagePortalVariables extends BaseVariableResult{
 
   PrivateMessagePortalVariables(){}
   factory PrivateMessagePortalVariables.fromJson(Map<String, dynamic> json) => _$PrivateMessagePortalVariablesFromJson(json);
-
+  Map<String, dynamic> toJson() => _$PrivateMessagePortalVariablesToJson(this);
 }
 
 @JsonSerializable()
@@ -67,5 +68,6 @@ class PrivateMessagePortal{
   PrivateMessagePortal();
 
   factory PrivateMessagePortal.fromJson(Map<String, dynamic> json) => _$PrivateMessagePortalFromJson(json);
+  Map<String, dynamic> toJson() => _$PrivateMessagePortalToJson(this);
 }
 
diff --git a/lib/page/PrivateMessageDetailPage.dart b/lib/page/PrivateMessageDetailPage.dart
index d0f0667..e541666 100644
--- a/lib/page/PrivateMessageDetailPage.dart
+++ b/lib/page/PrivateMessageDetailPage.dart
@@ -21,6 +21,7 @@ import 'package:flutter_easyloading/flutter_easyloading.dart';
 import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
 import 'package:provider/provider.dart';
 
+import '../utility/AppPlatformIcons.dart';
 import '../utility/EasyRefreshUtils.dart';
 import 'UserProfilePage.dart';
 
@@ -71,7 +72,6 @@ class _PrivateMessageDetailState
 
   @override
   void initState() {
-    // TODO: implement initState
     super.initState();
     _controller = EasyRefreshController(controlFinishLoad: true, controlFinishRefresh: true);
 
@@ -219,8 +219,8 @@ class _PrivateMessageDetailState
         appBar: PlatformAppBar(
           title: Text(toUsername),
           trailingActions: [
-            PlatformIconButton(
-              icon: Icon(PlatformIcons(context).ellipsis),
+            IconButton(
+              icon: Icon(AppPlatformIcons(context).userProfileSolid, size: 28,),
               onPressed: () {
                 Navigator.push(
                     context,
diff --git a/lib/screen/PrivateMessagePortalScreen.dart b/lib/screen/PrivateMessagePortalScreen.dart
index 5297fc5..7e508ff 100644
--- a/lib/screen/PrivateMessagePortalScreen.dart
+++ b/lib/screen/PrivateMessagePortalScreen.dart
@@ -1,3 +1,4 @@
+import 'dart:convert';
 import 'dart:developer';
 
 import 'package:dio/dio.dart';
@@ -20,13 +21,13 @@ import 'package:provider/provider.dart';
 
 import '../provider/DiscuzNotificationProvider.dart';
 import '../utility/EasyRefreshUtils.dart';
+import '../utility/UserPreferencesUtils.dart';
 
 class PrivateMessagePortalScreen extends StatelessWidget {
   PrivateMessagePortalScreen();
 
   @override
   Widget build(BuildContext context) {
-    // TODO: implement build
     return PrivateMessagePortalStatefulWidget();
   }
 }
@@ -54,10 +55,35 @@ class _PrivateMessagePortalState
 
   @override
   void initState() {
-    // TODO: implement initState
     super.initState();
+    _loadPrivateMessageCache();
     _controller = EasyRefreshController(controlFinishLoad: true, controlFinishRefresh: true);
+  }
+  
+  Future<void> _loadPrivateMessageCache() async{
+    log("Load private message cache");
+    Discuz? discuz =
+        Provider.of<DiscuzAndUserNotifier>(context, listen: false).discuz;
+    User? user =
+        Provider.of<DiscuzAndUserNotifier>(context, listen: false).user;
+    if(discuz!= null && user!= null){
+      String jsonString = await UserPreferencesUtils.getDiscuzPrivateMessageResultCacheJson(discuz, user!);
+      try{
+        PrivateMessagePortalResult cacheResult = PrivateMessagePortalResult.fromJson(jsonDecode(jsonString));
+        log("Set state ->");
+        setState(() {
+          result = cacheResult;
+          _pmList = cacheResult.variables.pmList;
+        });
+      }
+      catch(e,s){
 
+        log(e.toString());
+      }
+      log("Load private message string -> ${jsonString}");
+
+    }
+    
   }
 
   Future<IndicatorResult> _invalidateHotThreadContent(Discuz discuz) async {
@@ -78,12 +104,18 @@ class _PrivateMessagePortalState
     //
     // });
     Provider.of<DiscuzNotificationProvider>(context, listen: false).setNotificationCount(result.variables.noticeCount);
-    if(result.variables.count != 0 && _pmList.length >= result.variables.count){
-      _controller.finishLoad(IndicatorResult.noMore);
-      return IndicatorResult.noMore;
+    // if(result.variables.count != 0 && _pmList.length >= result.variables.count){
+    //   _controller.finishLoad(IndicatorResult.noMore);
+    //   return IndicatorResult.noMore;
+    // }
+    
+    if(user == null){
+      return IndicatorResult.fail;
     }
 
-    return await _client.privateMessagePortalResult(_page).then((value) {
+    return await _client.privateMessagePortalResult(_page).then((value) async{
+      String cacheString = jsonEncode(value.toJson());
+      await UserPreferencesUtils.putDiscuzPrivateMessageResultCacheJson(discuz, user!, cacheString);
       setState(() {
         result = value;
         _error = null;
@@ -93,11 +125,13 @@ class _PrivateMessagePortalState
           _pmList.addAll(value.variables.pmList);
         }
       });
+
       _page += 1;
       _controller.finishRefresh();
 
+
       // check for loaded all?
-      log("Get HotThread ${_pmList.length} ${value.variables.count}");
+      log("Get pm list ${_pmList.length} ${value.variables.count}");
       _controller.finishLoad(_pmList.length >= value.variables.count
           ? IndicatorResult.noMore
           : IndicatorResult.success);
diff --git a/lib/utility/AppPlatformIcons.dart b/lib/utility/AppPlatformIcons.dart
index 35e158c..6114503 100644
--- a/lib/utility/AppPlatformIcons.dart
+++ b/lib/utility/AppPlatformIcons.dart
@@ -158,4 +158,6 @@ class AppPlatformIcons{
   IconData get userIncognitoSolid => isMaterial(context)? Icons.airplanemode_active : CupertinoIcons.eyeglasses;
 
   IconData get discuzSolid => isMaterial(context)? Icons.amp_stories : Icons.amp_stories;
+
+  IconData get userProfileSolid => isMaterial(context)? Icons.person_outline : CupertinoIcons.person_crop_circle;
 }
\ No newline at end of file
diff --git a/lib/utility/UserPreferencesUtils.dart b/lib/utility/UserPreferencesUtils.dart
index 96f0733..0cb6a9a 100644
--- a/lib/utility/UserPreferencesUtils.dart
+++ b/lib/utility/UserPreferencesUtils.dart
@@ -7,6 +7,8 @@ import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
+import '../entity/User.dart';
+
 class UserPreferencesUtils{
   static final String recordHistoryKey = "recordHistoryKey";
 
@@ -611,5 +613,17 @@ class UserPreferencesUtils{
     await prefs.setString(discuzSmileyCacheJsonKey, value);
   }
 
+  static Future<String> getDiscuzPrivateMessageResultCacheJson(Discuz discuz, User user) async {
+    String discuzSmileyCacheJsonKey = "discuz_private_message_caches_${discuz.baseURL}_${user.uid}";
+    SharedPreferences prefs = await SharedPreferences.getInstance();
+    var string =  prefs.getString(discuzSmileyCacheJsonKey);
+    return string == null? "": string;
+  }
+
+  static Future<void> putDiscuzPrivateMessageResultCacheJson(Discuz discuz, User user,String value) async{
+    String discuzSmileyCacheJsonKey = "discuz_private_message_caches_${discuz.baseURL}_${user.uid}";
+    SharedPreferences prefs = await SharedPreferences.getInstance();
+    await prefs.setString(discuzSmileyCacheJsonKey, value);
+  }
 
 }
\ No newline at end of file
diff --git a/lib/widget/PrivateMessagePortalWidget.dart b/lib/widget/PrivateMessagePortalWidget.dart
index 6e90073..3780881 100644
--- a/lib/widget/PrivateMessagePortalWidget.dart
+++ b/lib/widget/PrivateMessagePortalWidget.dart
@@ -38,7 +38,7 @@ class PrivateMessagePortalWidget extends StatelessWidget{
         elevation: 4.0,
         color: Theme.of(context).brightness == Brightness.light? Colors.white: Colors.white10,
         surfaceTintColor: Theme.of(context).brightness == Brightness.light? Colors.white: Colors.white10,
-        child: Padding(padding: EdgeInsets.all(4.0),
+        child: Padding(padding: EdgeInsets.zero,
           child: child,
         ),
       ),
@@ -52,16 +52,22 @@ class PrivateMessagePortalWidget extends StatelessWidget{
 
         ],
       ),
-      child: ListTile(
-        leading: UserAvatar(_discuz,  _privateMessagePortal.toUid, _privateMessagePortal.toUserName, size: 36,),
+      child: PlatformListTile(
+        leading: UserAvatar(_discuz,  _privateMessagePortal.toUid, _privateMessagePortal.toUserName, size: 48,),
 
         title: Text(_privateMessagePortal.subject,
           overflow: TextOverflow.ellipsis,
-          maxLines: 2,
+          style: TextStyle(
+            fontWeight: FontWeight.bold
+          ),
+          maxLines: 1,
         ),
         subtitle: Text(
             "${_privateMessagePortal.msgFromName}: ${_privateMessagePortal.message}",
             overflow: TextOverflow.ellipsis,
+            style: TextStyle(
+              fontWeight: FontWeight.w300
+            ),
             maxLines: 1,
         ),