diff --git a/lib/src/models/notification_info.dart b/lib/src/models/notification_info.dart
index 085d5d8..b62c157 100644
--- a/lib/src/models/notification_info.dart
+++ b/lib/src/models/notification_info.dart
@@ -1,6 +1,6 @@
 import '../../flutter_openim_sdk.dart';
 
-/// OA notification
+/// OA Notification
 class OANotification {
   /// Title
   String? notificationName;
@@ -58,57 +58,50 @@ class OANotification {
     text = json['text'];
     externalUrl = json['externalUrl'];
     mixType = json['mixType'];
-    pictureElem = json['pictureElem'] != null
-        ? PictureElem.fromJson(json['pictureElem'])
-        : null;
-    soundElem = json['soundElem'] != null
-        ? SoundElem.fromJson(json['soundElem'])
-        : null;
-    videoElem = json['videoElem'] != null
-        ? VideoElem.fromJson(json['videoElem'])
-        : null;
-    fileElem =
-        json['fileElem'] != null ? FileElem.fromJson(json['fileElem']) : null;
+    pictureElem = json['pictureElem'] != null ? PictureElem.fromJson(json['pictureElem']) : null;
+    soundElem = json['soundElem'] != null ? SoundElem.fromJson(json['soundElem']) : null;
+    videoElem = json['videoElem'] != null ? VideoElem.fromJson(json['videoElem']) : null;
+    fileElem = json['fileElem'] != null ? FileElem.fromJson(json['fileElem']) : null;
     ex = json['ex'];
   }
 
   Map<String, dynamic> toJson() {
     final data = Map<String, dynamic>();
-    data['notificationName'] = this.notificationName;
-    data['notificationFaceURL'] = this.notificationFaceURL;
-    data['notificationType'] = this.notificationType;
-    data['text'] = this.text;
-    data['externalUrl'] = this.externalUrl;
-    data['mixType'] = this.mixType;
-    if (this.pictureElem != null) {
-      data['pictureElem'] = this.pictureElem!.toJson();
+    data['notificationName'] = notificationName;
+    data['notificationFaceURL'] = notificationFaceURL;
+    data['notificationType'] = notificationType;
+    data['text'] = text;
+    data['externalUrl'] = externalUrl;
+    data['mixType'] = mixType;
+    if (pictureElem != null) {
+      data['pictureElem'] = pictureElem!.toJson();
     }
-    if (this.soundElem != null) {
-      data['soundElem'] = this.soundElem!.toJson();
+    if (soundElem != null) {
+      data['soundElem'] = soundElem!.toJson();
     }
-    if (this.videoElem != null) {
-      data['videoElem'] = this.videoElem!.toJson();
+    if (videoElem != null) {
+      data['videoElem'] = videoElem!.toJson();
     }
-    if (this.fileElem != null) {
-      data['fileElem'] = this.fileElem!.toJson();
+    if (fileElem != null) {
+      data['fileElem'] = fileElem!.toJson();
     }
-    data['ex'] = this.ex;
+    data['ex'] = ex;
     return data;
   }
 }
 
-/// 群事件通知
+/// Group Event Notification
 class GroupNotification {
-  /// 群信息
+  /// Group information
   GroupInfo? group;
 
-  /// 当前事件操作者信息
+  /// Current event operator information
   GroupMembersInfo? opUser;
 
-  /// 群拥有者信息
+  /// Group owner information
   GroupMembersInfo? groupOwnerUser;
 
-  /// 产生影响的群成员列表
+  /// List of affected group members
   List<GroupMembersInfo>? memberList;
 
   GroupNotification({
@@ -120,12 +113,8 @@ class GroupNotification {
 
   GroupNotification.fromJson(Map<String, dynamic> json) {
     group = json['group'] != null ? GroupInfo.fromJson(json['group']) : null;
-    opUser = json['opUser'] != null
-        ? GroupMembersInfo.fromJson(json['opUser'])
-        : null;
-    groupOwnerUser = json['groupOwnerUser'] != null
-        ? GroupMembersInfo.fromJson(json['groupOwnerUser'])
-        : null;
+    opUser = json['opUser'] != null ? GroupMembersInfo.fromJson(json['opUser']) : null;
+    groupOwnerUser = json['groupOwnerUser'] != null ? GroupMembersInfo.fromJson(json['groupOwnerUser']) : null;
     if (json['memberList'] != null) {
       memberList = <GroupMembersInfo>[];
       json['memberList'].forEach((v) {
@@ -136,40 +125,42 @@ class GroupNotification {
 
   Map<String, dynamic> toJson() {
     final data = Map<String, dynamic>();
-    if (this.group != null) {
-      data['group'] = this.group!.toJson();
+    if (group != null) {
+      data['group'] = group!.toJson();
     }
-    if (this.opUser != null) {
-      data['opUser'] = this.opUser!.toJson();
+    if (opUser != null) {
+      data['opUser'] = opUser!.toJson();
     }
-    if (this.groupOwnerUser != null) {
-      data['groupOwnerUser'] = this.groupOwnerUser!.toJson();
+    if (groupOwnerUser != null) {
+      data['groupOwnerUser'] = groupOwnerUser!.toJson();
     }
-    if (this.memberList != null) {
-      data['memberList'] = this.memberList!.map((v) => v.toJson()).toList();
+    if (memberList != null) {
+      data['memberList'] = memberList!.map((v) => v.toJson()).toList();
     }
     return data;
   }
 }
 
-/// 用户被邀请进群通知
+/// User Invited to Join Group Notification
 class InvitedJoinGroupNotification {
-  /// 群信息
+  /// Group information
   GroupInfo? group;
 
-  /// 操作者信息
+  /// Operator information
   GroupMembersInfo? opUser;
 
-  /// 被邀请进群的成员信息
+  /// Inviter information
+  GroupMembersInfo? inviterUser;
+
+  /// List of members invited to join the group
   List<GroupMembersInfo>? invitedUserList;
 
   InvitedJoinGroupNotification({this.group, this.opUser, this.invitedUserList});
 
   InvitedJoinGroupNotification.fromJson(Map<String, dynamic> json) {
     group = json['group'] != null ? GroupInfo.fromJson(json['group']) : null;
-    opUser = json['opUser'] != null
-        ? GroupMembersInfo.fromJson(json['opUser'])
-        : null;
+    opUser = json['opUser'] != null ? GroupMembersInfo.fromJson(json['opUser']) : null;
+    inviterUser = json['inviterUser'] != null ? GroupMembersInfo.fromJson(json['inviterUser']) : null;
     if (json['invitedUserList'] != null) {
       invitedUserList = <GroupMembersInfo>[];
       json['invitedUserList'].forEach((v) {
@@ -179,40 +170,39 @@ class InvitedJoinGroupNotification {
   }
 
   Map<String, dynamic> toJson() {
-    final Map<String, dynamic> data = new Map<String, dynamic>();
-    if (this.group != null) {
-      data['group'] = this.group!.toJson();
+    final Map<String, dynamic> data = <String, dynamic>{};
+    if (group != null) {
+      data['group'] = group!.toJson();
     }
-    if (this.opUser != null) {
-      data['opUser'] = this.opUser!.toJson();
+    if (opUser != null) {
+      data['opUser'] = opUser!.toJson();
     }
-    if (this.invitedUserList != null) {
-      data['invitedUserList'] =
-          this.invitedUserList!.map((v) => v.toJson()).toList();
+    if (inviterUser != null) {
+      data['inviterUser'] = inviterUser!.toJson();
+    }
+    if (invitedUserList != null) {
+      data['invitedUserList'] = invitedUserList!.map((v) => v.toJson()).toList();
     }
     return data;
   }
 }
 
-/// 组踢出成员通知
+/// Group Member Kicked Notification
 class KickedGroupMemeberNotification {
-  /// 群信息
+  /// Group information
   GroupInfo? group;
 
-  /// 操作者信息
+  /// Operator information
   GroupMembersInfo? opUser;
 
-  /// 被踢出群的成员信息列表
+  /// List of members kicked from the group
   List<GroupMembersInfo>? kickedUserList;
 
-  KickedGroupMemeberNotification(
-      {this.group, this.opUser, this.kickedUserList});
+  KickedGroupMemeberNotification({this.group, this.opUser, this.kickedUserList});
 
   KickedGroupMemeberNotification.fromJson(Map<String, dynamic> json) {
     group = json['group'] != null ? GroupInfo.fromJson(json['group']) : null;
-    opUser = json['opUser'] != null
-        ? GroupMembersInfo.fromJson(json['opUser'])
-        : null;
+    opUser = json['opUser'] != null ? GroupMembersInfo.fromJson(json['opUser']) : null;
     if (json['kickedUserList'] != null) {
       kickedUserList = <GroupMembersInfo>[];
       json['kickedUserList'].forEach((v) {
@@ -223,87 +213,82 @@ class KickedGroupMemeberNotification {
 
   Map<String, dynamic> toJson() {
     final Map<String, dynamic> data = new Map<String, dynamic>();
-    if (this.group != null) {
-      data['group'] = this.group!.toJson();
+    if (group != null) {
+      data['group'] = group!.toJson();
     }
-    if (this.opUser != null) {
-      data['opUser'] = this.opUser!.toJson();
+    if (opUser != null) {
+      data['opUser'] = opUser!.toJson();
     }
-    if (this.kickedUserList != null) {
-      data['kickedUserList'] =
-          this.kickedUserList!.map((v) => v.toJson()).toList();
+    if (kickedUserList != null) {
+      data['kickedUserList'] = kickedUserList!.map((v) => v.toJson()).toList();
     }
     return data;
   }
 }
 
-/// 退出群通知
+/// Quit Group Notification
 class QuitGroupNotification {
-  /// 群信息
+  /// Group information
   GroupInfo? group;
 
-  /// 退群的成员信息
+  /// Information of the member who quit the group
   GroupMembersInfo? quitUser;
 
   QuitGroupNotification({this.group, this.quitUser});
 
   QuitGroupNotification.fromJson(Map<String, dynamic> json) {
     group = json['group'] != null ? GroupInfo.fromJson(json['group']) : null;
-    quitUser = json['quitUser'] != null
-        ? GroupMembersInfo.fromJson(json['quitUser'])
-        : null;
+    quitUser = json['quitUser'] != null ? GroupMembersInfo.fromJson(json['quitUser']) : null;
   }
 
   Map<String, dynamic> toJson() {
     final data = Map<String, dynamic>();
-    if (this.group != null) {
-      data['group'] = this.group!.toJson();
+    if (group != null) {
+      data['group'] = group!.toJson();
     }
-    if (this.quitUser != null) {
-      data['quitUser'] = this.quitUser!.toJson();
+    if (quitUser != null) {
+      data['quitUser'] = quitUser!.toJson();
     }
     return data;
   }
 }
 
-/// 进群通知
+/// Enter Group Notification
 class EnterGroupNotification {
-  /// 群信息
+  /// Group information
   GroupInfo? group;
 
-  /// 进入群的成员信息
+  /// Information of the member who entered the group
   GroupMembersInfo? entrantUser;
 
   EnterGroupNotification({this.group, this.entrantUser});
 
   EnterGroupNotification.fromJson(Map<String, dynamic> json) {
     group = json['group'] != null ? GroupInfo.fromJson(json['group']) : null;
-    entrantUser = json['entrantUser'] != null
-        ? GroupMembersInfo.fromJson(json['entrantUser'])
-        : null;
+    entrantUser = json['entrantUser'] != null ? GroupMembersInfo.fromJson(json['entrantUser']) : null;
   }
 
   Map<String, dynamic> toJson() {
     final data = Map<String, dynamic>();
-    if (this.group != null) {
-      data['group'] = this.group!.toJson();
+    if (group != null) {
+      data['group'] = group!.toJson();
     }
-    if (this.entrantUser != null) {
-      data['quitUser'] = this.entrantUser!.toJson();
+    if (entrantUser != null) {
+      data['entrantUser'] = entrantUser!.toJson();
     }
     return data;
   }
 }
 
-/// 群权转让通知
+/// Group Rights Transfer Notification
 class GroupRightsTransferNoticication {
-  /// 群信息
+  /// Group information
   GroupInfo? group;
 
-  /// 操作者信息
+  /// Operator information
   GroupMembersInfo? opUser;
 
-  /// 群新的拥有者信息
+  /// New group owner information
   GroupMembersInfo? newGroupOwner;
 
   GroupRightsTransferNoticication({
@@ -314,41 +299,37 @@ class GroupRightsTransferNoticication {
 
   GroupRightsTransferNoticication.fromJson(Map<String, dynamic> json) {
     group = json['group'] != null ? GroupInfo.fromJson(json['group']) : null;
-    opUser = json['opUser'] != null
-        ? GroupMembersInfo.fromJson(json['opUser'])
-        : null;
-    newGroupOwner = json['newGroupOwner'] != null
-        ? GroupMembersInfo.fromJson(json['newGroupOwner'])
-        : null;
+    opUser = json['opUser'] != null ? GroupMembersInfo.fromJson(json['opUser']) : null;
+    newGroupOwner = json['newGroupOwner'] != null ? GroupMembersInfo.fromJson(json['newGroupOwner']) : null;
   }
 
   Map<String, dynamic> toJson() {
     final data = Map<String, dynamic>();
-    if (this.group != null) {
-      data['group'] = this.group!.toJson();
+    if (group != null) {
+      data['group'] = group!.toJson();
     }
-    if (this.opUser != null) {
-      data['opUser'] = this.opUser!.toJson();
+    if (opUser != null) {
+      data['opUser'] = opUser!.toJson();
     }
-    if (this.newGroupOwner != null) {
-      data['newGroupOwner'] = this.newGroupOwner!.toJson();
+    if (newGroupOwner != null) {
+      data['newGroupOwner'] = newGroupOwner!.toJson();
     }
     return data;
   }
 }
 
-/// 禁言成员通知
+/// Mute Member Notification
 class MuteMemberNotification {
-  /// 群信息
+  /// Group information
   GroupInfo? group;
 
-  /// 操作者信息
+  /// Operator information
   GroupMembersInfo? opUser;
 
-  /// 被禁言的成员信息
+  /// Muted member information
   GroupMembersInfo? mutedUser;
 
-  /// 禁言时间s
+  /// Mute duration in seconds
   int? mutedSeconds;
 
   MuteMemberNotification({
@@ -360,40 +341,36 @@ class MuteMemberNotification {
 
   MuteMemberNotification.fromJson(Map<String, dynamic> json) {
     group = json['group'] != null ? GroupInfo.fromJson(json['group']) : null;
-    opUser = json['opUser'] != null
-        ? GroupMembersInfo.fromJson(json['opUser'])
-        : null;
-    mutedUser = json['mutedUser'] != null
-        ? GroupMembersInfo.fromJson(json['mutedUser'])
-        : null;
+    opUser = json['opUser'] != null ? GroupMembersInfo.fromJson(json['opUser']) : null;
+    mutedUser = json['mutedUser'] != null ? GroupMembersInfo.fromJson(json['mutedUser']) : null;
     mutedSeconds = json['mutedSeconds'];
   }
 
   Map<String, dynamic> toJson() {
     final data = Map<String, dynamic>();
-    if (this.group != null) {
-      data['group'] = this.group!.toJson();
+    if (group != null) {
+      data['group'] = group!.toJson();
     }
-    if (this.opUser != null) {
-      data['opUser'] = this.opUser!.toJson();
+    if (opUser != null) {
+      data['opUser'] = opUser!.toJson();
     }
-    if (this.mutedUser != null) {
-      data['mutedUser'] = this.mutedUser!.toJson();
+    if (mutedUser != null) {
+      data['mutedUser'] = mutedUser!.toJson();
     }
-    data['mutedSeconds'] = this.mutedSeconds;
+    data['mutedSeconds'] = mutedSeconds;
     return data;
   }
 }
 
-/// 阅后即焚通知
+/// Burn After Reading Notification
 class BurnAfterReadingNotification {
-  /// 接收者
+  /// Receiver
   String? recvID;
 
-  /// 发送者
+  /// Sender
   String? sendID;
 
-  /// 是否开启
+  /// Whether enabled
   bool? isPrivate;
 
   BurnAfterReadingNotification({this.recvID, this.sendID, this.isPrivate});
@@ -406,22 +383,22 @@ class BurnAfterReadingNotification {
 
   Map<String, dynamic> toJson() {
     final data = Map<String, dynamic>();
-    data['recvID'] = this.recvID;
-    data['sendID'] = this.sendID;
-    data['isPrivate'] = this.isPrivate;
+    data['recvID'] = recvID;
+    data['sendID'] = sendID;
+    data['isPrivate'] = isPrivate;
     return data;
   }
 }
 
-/// 群成员信息发送变化通知
+/// Group Member Information Changed Notification
 class GroupMemberInfoChangedNotification {
-  /// 群信息
+  /// Group information
   GroupInfo? group;
 
-  /// 操作者信息
+  /// Operator information
   GroupMembersInfo? opUser;
 
-  /// 资料发生改变的成员
+  /// Member with changed information
   GroupMembersInfo? changedUser;
 
   GroupMemberInfoChangedNotification({
@@ -432,25 +409,21 @@ class GroupMemberInfoChangedNotification {
 
   GroupMemberInfoChangedNotification.fromJson(Map<String, dynamic> json) {
     group = json['group'] != null ? GroupInfo.fromJson(json['group']) : null;
-    opUser = json['opUser'] != null
-        ? GroupMembersInfo.fromJson(json['opUser'])
-        : null;
-    changedUser = json['changedUser'] != null
-        ? GroupMembersInfo.fromJson(json['changedUser'])
-        : null;
+    opUser = json['opUser'] != null ? GroupMembersInfo.fromJson(json['opUser']) : null;
+    changedUser = json['changedUser'] != null ? GroupMembersInfo.fromJson(json['changedUser']) : null;
   }
 
   Map<String, dynamic> toJson() {
     final data = Map<String, dynamic>();
-    if (this.group != null) {
-      data['group'] = this.group!.toJson();
+    if (group != null) {
+      data['group'] = group!.toJson();
     }
-    if (this.opUser != null) {
-      data['opUser'] = this.opUser!.toJson();
+    if (opUser != null) {
+      data['opUser'] = opUser!.toJson();
     }
-    if (this.changedUser != null) {
-      data['changedUser'] = this.changedUser!.toJson();
+    if (changedUser != null) {
+      data['changedUser'] = changedUser!.toJson();
     }
     return data;
   }
-}
+}
\ No newline at end of file
diff --git a/lib/src/openim.dart b/lib/src/openim.dart
index 302fcc6..974636a 100644
--- a/lib/src/openim.dart
+++ b/lib/src/openim.dart
@@ -2,7 +2,7 @@ import 'package:flutter/services.dart';
 import 'package:flutter_openim_sdk/flutter_openim_sdk.dart';
 
 class OpenIM {
-  static const version = '3.8.3+3';
+  static const version = '3.8.3-patch3+1';
 
   static const _channel = MethodChannel('flutter_openim_sdk');
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 83ff101..ffadbb6 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: flutter_openim_sdk
 description: An instant messaging plug-in that supports Android and IOS. And the server is also all open source.
-version: 3.8.3+3
+version: 3.8.3-patch3+1
 homepage: https://www.openim.io
 repository: https://github.com/openimsdk/open-im-sdk-flutter