diff --git a/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Common/System/WeChatXmlDataSerializeExtensions.cs b/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Common/System/WeChatXmlDataSerializeExtensions.cs
index be11aeb99..bef133f38 100644
--- a/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Common/System/WeChatXmlDataSerializeExtensions.cs
+++ b/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Common/System/WeChatXmlDataSerializeExtensions.cs
@@ -44,7 +44,8 @@ public static class WeChatXmlDataSerializeExtensions
         var objectType = message.GetType();
         var settings = new XmlWriterSettings
         {
-            Encoding = Encoding.UTF8,
+            // Encoding = Encoding.UTF8,
+            Encoding = new UTF8Encoding(false),
             Indent = false,
             OmitXmlDeclaration = true,
             WriteEndDocumentOnClose = false,
diff --git a/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Work.ExternalContact/LINGYUN/Abp/WeChat/Work/ExternalContact/Messages/Models/ExternalChatMemberJoinScene.cs b/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Work.ExternalContact/LINGYUN/Abp/WeChat/Work/ExternalContact/Messages/Models/ExternalChatMemberJoinScene.cs
index 1eb129638..c40a710e1 100644
--- a/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Work.ExternalContact/LINGYUN/Abp/WeChat/Work/ExternalContact/Messages/Models/ExternalChatMemberJoinScene.cs
+++ b/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Work.ExternalContact/LINGYUN/Abp/WeChat/Work/ExternalContact/Messages/Models/ExternalChatMemberJoinScene.cs
@@ -1,4 +1,5 @@
 using System.ComponentModel;
+using System.Xml.Serialization;
 
 namespace LINGYUN.Abp.WeChat.Work.ExternalContact.Messages.Models;
 /// <summary>
@@ -10,11 +11,13 @@ public enum ExternalChatMemberJoinScene
     /// <summary>
     /// 由成员邀请入群
     /// </summary>
+    [XmlEnum("0")]
     [Description("由成员邀请入群")]
     MemberInvitation = 0,
     /// <summary>
     /// 通过扫描群二维码入群
     /// </summary>
+    [XmlEnum("3")]
     [Description("通过扫描群二维码入群")]
     ScanQrCode = 3
 }
diff --git a/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Work.ExternalContact/LINGYUN/Abp/WeChat/Work/ExternalContact/Messages/Models/ExternalChatMemberQuitScene.cs b/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Work.ExternalContact/LINGYUN/Abp/WeChat/Work/ExternalContact/Messages/Models/ExternalChatMemberQuitScene.cs
index 1a02803ac..f2233d9c7 100644
--- a/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Work.ExternalContact/LINGYUN/Abp/WeChat/Work/ExternalContact/Messages/Models/ExternalChatMemberQuitScene.cs
+++ b/aspnet-core/framework/wechat/LINGYUN.Abp.WeChat.Work.ExternalContact/LINGYUN/Abp/WeChat/Work/ExternalContact/Messages/Models/ExternalChatMemberQuitScene.cs
@@ -1,4 +1,5 @@
 using System.ComponentModel;
+using System.Xml.Serialization;
 
 namespace LINGYUN.Abp.WeChat.Work.ExternalContact.Messages.Models;
 /// <summary>
@@ -10,11 +11,13 @@ public enum ExternalChatMemberQuitScene
     /// <summary>
     /// 自己退群
     /// </summary>
+    [XmlEnum("0")]
     [Description("自己退群")]
     UserSelf = 0,
     /// <summary>
     /// 群主/群管理员移出
     /// </summary>
+    [XmlEnum("1")]
     [Description("群主/群管理员移出")]
     Admin = 1
 }