diff --git a/Realtime/Internal/Controller/LCIMMessageController.cs b/Realtime/Internal/Controller/LCIMMessageController.cs
index 11ec039..830328f 100644
--- a/Realtime/Internal/Controller/LCIMMessageController.cs
+++ b/Realtime/Internal/Controller/LCIMMessageController.cs
@@ -56,7 +56,7 @@ namespace LeanCloud.Realtime.Internal.Controller {
             // 消息发送应答
             AckCommand ack = response.AckMessage;
             message.Id = ack.Uid;
-            message.DeliveredTimestamp = ack.T;
+            message.SentTimestamp = ack.T;
             return message;
         }
 
@@ -72,7 +72,10 @@ namespace LeanCloud.Realtime.Internal.Controller {
             PatchItem item = new PatchItem {
                 Cid = convId,
                 Mid = message.Id,
-                Recall = true
+                From = Client.Id,
+                Recall = true,
+                Timestamp = message.SentTimestamp,
+                PatchTimestamp = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds(),
             };
             patch.Patches.Add(item);
             GenericCommand request = NewCommand(CommandType.Patch, OpType.Modify);
@@ -94,8 +97,10 @@ namespace LeanCloud.Realtime.Internal.Controller {
             PatchItem item = new PatchItem {
                 Cid = convId,
                 Mid = oldMessage.Id,
-                Timestamp = oldMessage.DeliveredTimestamp,
+                From = Client.Id,
                 Recall = false,
+                Timestamp = oldMessage.SentTimestamp,
+                PatchTimestamp = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds(),
             };
             if (newMessage is LCIMTypedMessage typedMessage) {
                 item.Data = JsonConvert.SerializeObject(typedMessage.Encode());
@@ -218,6 +223,41 @@ namespace LeanCloud.Realtime.Internal.Controller {
         #region 消息处理
 
         internal override async Task OnNotification(GenericCommand notification) {
+            if (notification.Cmd == CommandType.Patch) {
+                await OnMessagePatched(notification);
+            } else if (notification.Cmd == CommandType.Direct) {
+                await OnMessaage(notification);
+            }
+        }
+
+        private async Task OnMessagePatched(GenericCommand notification) {
+            PatchCommand patchMessage = notification.PatchMessage;
+            foreach (PatchItem patch in patchMessage.Patches) {
+                // 获取对话
+                LCIMConversation conversation = await Client.GetOrQueryConversation(patch.Cid);
+                LCIMMessage message;
+                if (patch.HasBinaryMsg) {
+                    byte[] bytes = patch.BinaryMsg.ToByteArray();
+                    message = LCIMBinaryMessage.Deserialize(bytes);
+                } else {
+                    message = LCIMTypedMessage.Deserialize(patch.Data);
+                }
+                message.ConversationId = patch.Cid;
+                message.Id = patch.Mid;
+                message.FromClientId = patch.From;
+                message.SentTimestamp = patch.Timestamp;
+                message.PatchedTimestamp = patch.PatchTimestamp;
+                if (message is LCIMRecalledMessage recalledMessage) {
+                    // 消息撤回
+                    Client.OnMessageRecalled?.Invoke(conversation, recalledMessage);
+                } else {
+                    // 消息修改
+                    Client.OnMessageUpdated?.Invoke(conversation, message);
+                }
+            }
+        }
+
+        private async Task OnMessaage(GenericCommand notification) {
             DirectCommand direct = notification.DirectMessage;
             // 反序列化消息
             LCIMMessage message;
diff --git a/Realtime/Internal/Controller/LCIMSessionController.cs b/Realtime/Internal/Controller/LCIMSessionController.cs
index 6017ca6..f0c5353 100644
--- a/Realtime/Internal/Controller/LCIMSessionController.cs
+++ b/Realtime/Internal/Controller/LCIMSessionController.cs
@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
-using LeanCloud.Storage;
 using LeanCloud.Realtime.Protocol;
 
 namespace LeanCloud.Realtime.Internal.Controller {
@@ -23,6 +22,7 @@ namespace LeanCloud.Realtime.Internal.Controller {
         internal async Task Open(bool force) {
             SessionCommand session = await NewSessionCommand();
             session.R = !force;
+            session.ConfigBitmap = 0x7B;
             GenericCommand request = NewCommand(CommandType.Session, OpType.Open);
             request.SessionMessage = session;
             GenericCommand response = await Client.Connection.SendRequest(request);
diff --git a/Realtime/LCIMClient.cs b/Realtime/LCIMClient.cs
index 6e87afd..a5e7c24 100644
--- a/Realtime/LCIMClient.cs
+++ b/Realtime/LCIMClient.cs
@@ -165,7 +165,7 @@ namespace LeanCloud.Realtime {
         /// <summary>
         /// 消息被撤回
         /// </summary>
-        public Action<LCIMConversation, LCIMMessage> OnMessageRecalled {
+        public Action<LCIMConversation, LCIMRecalledMessage> OnMessageRecalled {
             get; set;
         }
 
@@ -449,6 +449,7 @@ namespace LeanCloud.Realtime {
                     _ = ConversationController.OnNotification(notification);
                     break;
                 case CommandType.Direct:
+                case CommandType.Patch:
                     _ = MessageController.OnNotification(notification);
                     break;
                 case CommandType.Unread:
diff --git a/Realtime/Message/LCIMMessage.cs b/Realtime/Message/LCIMMessage.cs
index 786c229..77fc128 100644
--- a/Realtime/Message/LCIMMessage.cs
+++ b/Realtime/Message/LCIMMessage.cs
@@ -9,6 +9,7 @@ namespace LeanCloud.Realtime {
         internal const int VideoMessageType = -4;
         internal const int LocationMessageType = -5;
         internal const int FileMessageType = -6;
+        internal const int RecalledMessageType = -127;
             
         public string ConversationId {
             get; set;
diff --git a/Realtime/Message/LCIMRecalledMessage.cs b/Realtime/Message/LCIMRecalledMessage.cs
index a54d243..3706dda 100644
--- a/Realtime/Message/LCIMRecalledMessage.cs
+++ b/Realtime/Message/LCIMRecalledMessage.cs
@@ -1,7 +1,12 @@
 
 namespace LeanCloud.Realtime {
-    public class LCIMRecalledMessage {
+    /// <summary>
+    /// 撤回消息
+    /// </summary>
+    public class LCIMRecalledMessage : LCIMTypedMessage {
         public LCIMRecalledMessage() {
         }
+
+        internal override int MessageType => RecalledMessageType;
     }
 }
diff --git a/Realtime/Message/LCIMTypedMessage.cs b/Realtime/Message/LCIMTypedMessage.cs
index fb0a61b..08a5d6d 100644
--- a/Realtime/Message/LCIMTypedMessage.cs
+++ b/Realtime/Message/LCIMTypedMessage.cs
@@ -52,24 +52,27 @@ namespace LeanCloud.Realtime {
             LCIMTypedMessage message = null;
             int msgType = (int)msgData["_lctype"];
             switch (msgType) {
-                case -1:
+                case TextMessageType:
                     message = new LCIMTextMessage();
                     break;
-                case -2:
+                case ImageMessageType:
                     message = new LCIMImageMessage();
                     break;
-                case -3:
+                case AudioMessageType:
                     message = new LCIMAudioMessage();
                     break;
-                case -4:
+                case VideoMessageType:
                     message = new LCIMVideoMessage();
                     break;
-                case -5:
+                case LocationMessageType:
                     message = new LCIMLocationMessage();
                     break;
-                case -6:
+                case FileMessageType:
                     message = new LCIMFileMessage();
                     break;
+                case RecalledMessageType:
+                    message = new LCIMRecalledMessage();
+                    break;
                 default:
                     // TODO 用户自定义类型消息