diff --git a/Realtime/Conversation/LCIMChatRoom.cs b/Realtime/Conversation/LCIMChatRoom.cs
index b521d8a..352b057 100644
--- a/Realtime/Conversation/LCIMChatRoom.cs
+++ b/Realtime/Conversation/LCIMChatRoom.cs
@@ -2,7 +2,7 @@
 
 namespace LeanCloud.Realtime {
     public class LCIMChatRoom : LCIMConversation {
-        public LCIMChatRoom() {
+        public LCIMChatRoom(LCIMClient client) : base(client) {
         }
     }
 }
diff --git a/Realtime/Conversation/LCIMConversation.cs b/Realtime/Conversation/LCIMConversation.cs
index 8566857..4dc9867 100644
--- a/Realtime/Conversation/LCIMConversation.cs
+++ b/Realtime/Conversation/LCIMConversation.cs
@@ -1,6 +1,8 @@
 using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
+using System.Linq;
+using LeanCloud.Realtime.Protocol;
 
 namespace LeanCloud.Realtime {
     public class LCIMConversation {
@@ -34,8 +36,10 @@ namespace LeanCloud.Realtime {
 
         public virtual bool IsTransient => false;
 
-        public LCIMConversation() {
+        private readonly LCIMClient client;
 
+        internal LCIMConversation(LCIMClient client) {
+            this.client = client;
         }
 
         public void Set(string key, object value) {
@@ -114,5 +118,23 @@ namespace LeanCloud.Realtime {
         public async Task<List<LCIMConversationMemberInfo>> GetAllMemberInfo() {
             return null;
         }
+
+        internal void MergeFrom(ConvCommand conv) {
+            if (conv.HasCid) {
+                Id = conv.Cid;
+            }
+            if (conv.HasInitBy) {
+                CreatorId = conv.InitBy;
+            }
+            if (conv.HasCdate) {
+                CreatedAt = DateTime.Parse(conv.Cdate);
+            }
+            if (conv.HasUdate) {
+                UpdatedAt = DateTime.Parse(conv.Udate);
+            }
+            if (conv.M.Count > 0) {
+                MemberIdList = conv.M.ToList();
+            }
+        }
     }
 }
diff --git a/Realtime/Conversation/LCIMTemporaryConversation.cs b/Realtime/Conversation/LCIMTemporaryConversation.cs
index bbd0322..b4e26b3 100644
--- a/Realtime/Conversation/LCIMTemporaryConversation.cs
+++ b/Realtime/Conversation/LCIMTemporaryConversation.cs
@@ -2,7 +2,7 @@
 
 namespace LeanCloud.Realtime {
     public class LCIMTemporaryConversation : LCIMConversation {
-        public LCIMTemporaryConversation() {
+        public LCIMTemporaryConversation(LCIMClient client) : base(client) {
         }
     }
 }
diff --git a/Realtime/LCIMClient.cs b/Realtime/LCIMClient.cs
index a38ddeb..3cadfa6 100644
--- a/Realtime/LCIMClient.cs
+++ b/Realtime/LCIMClient.cs
@@ -13,6 +13,8 @@ namespace LeanCloud.Realtime {
 
         private LCWebSocketClient client;
 
+        private Dictionary<string, LCIMConversation> conversationDict;
+
         /// <summary>
         /// 当前用户被加入某个对话的黑名单
         /// </summary>
@@ -68,6 +70,7 @@ namespace LeanCloud.Realtime {
 
         public LCIMClient(string clientId) {
             this.clientId = clientId;
+            conversationDict = new Dictionary<string, LCIMConversation>();
         }
 
         public async Task Open() {
@@ -132,9 +135,9 @@ namespace LeanCloud.Realtime {
             }
             command.ConvMessage = conv;
             GenericCommand response = await client.SendRequest(command);
-            // TODO 实例化对话对象
-
-            LCIMConversation conversation = new LCIMConversation();
+            LCIMConversation conversation = new LCIMConversation(this);
+            conversation.MergeFrom(response.ConvMessage);
+            conversationDict[conversation.Id] = conversation;
             return conversation;
         }
 
@@ -174,11 +177,17 @@ namespace LeanCloud.Realtime {
         }
 
         private void OnConversationJoined(ConvCommand conv) {
-            OnInvited?.Invoke(null, conv.InitBy);
+            if (conversationDict.TryGetValue(conv.Cid, out LCIMConversation conversation)) {
+                conversation.MergeFrom(conv);
+            }
+            OnInvited?.Invoke(conversation, conv.InitBy);
         }
 
         private void OnConversationMembersJoined(ConvCommand conv) {
-            OnMembersJoined?.Invoke(null, conv.M.ToList(), conv.InitBy);
+            if (conversationDict.TryGetValue(conv.Cid, out LCIMConversation conversation)) {
+                conversation.MergeFrom(conv);
+            }
+            OnMembersJoined?.Invoke(conversation, conv.M.ToList(), conv.InitBy);
         }
 
         private GenericCommand NewCommand(CommandType cmd, OpType op) {
diff --git a/Test/Realtime.Test/Conversation.cs b/Test/Realtime.Test/Conversation.cs
index 8e97e4e..f747d58 100644
--- a/Test/Realtime.Test/Conversation.cs
+++ b/Test/Realtime.Test/Conversation.cs
@@ -30,10 +30,14 @@ namespace Realtime.Test {
 
             client.OnInvited = (conv, initBy) => {
                 TestContext.WriteLine($"on invited: {initBy}");
+                TestContext.WriteLine(conv.CreatorId);
             };
 
             client.OnMembersJoined = (conv, memberList, initBy) => {
                 TestContext.WriteLine($"on members joined: {initBy}");
+                foreach (string memberId in conv.MemberIdList) {
+                    TestContext.WriteLine(memberId);
+                }
                 tcs.SetResult(null);
             };