diff --git a/Game/AI/DefaultExecutor.cs b/Game/AI/DefaultExecutor.cs
index 2f80ab9b..3cf30deb 100644
--- a/Game/AI/DefaultExecutor.cs
+++ b/Game/AI/DefaultExecutor.cs
@@ -231,6 +231,12 @@ public override void OnNewTurn()
             HonestEffectCount = 0;
         }
 
+        public override IList<string> OnChat(int player, string msg, string myname, string speakername)
+        {
+            string[] reply ={ "OK. I got it~"};
+            return reply;
+        }
+
         /// <summary>
         /// Destroy face-down cards first, in our turn.
         /// </summary>
diff --git a/Game/AI/Dialogs.cs b/Game/AI/Dialogs.cs
index d0f7fa30..7b554b00 100644
--- a/Game/AI/Dialogs.cs
+++ b/Game/AI/Dialogs.cs
@@ -158,6 +158,17 @@ public void SendChaining(string card)
             InternalSendMessage(_chaining, card);
         }
 
+        public void SendChatReply(IList<string> strs)
+        {
+            if (!_game._chat)
+                return;
+            foreach (string s in strs)
+            {
+                if (s != null && s.Length > 0) 
+                    _game.Chat("[AI]:"+s);
+            }
+        }
+
         private void InternalSendMessage(IList<string> array, params object[] opts)
         {
             if (!_game._chat)
diff --git a/Game/AI/Executor.cs b/Game/AI/Executor.cs
index 224e5965..21fcabb4 100644
--- a/Game/AI/Executor.cs
+++ b/Game/AI/Executor.cs
@@ -45,6 +45,12 @@ public virtual bool OnSelectHand()
             return Program.Rand.Next(2) > 0;
         }
 
+        public virtual IList<string> OnChat(int player, string msg, string myname, string speakername)
+        {
+            // for overriding
+            return null;
+        }
+
         /// <summary>
         /// Called when the AI has to decide if it should attack
         /// </summary>
diff --git a/Game/ClientCard.cs b/Game/ClientCard.cs
index a0c9e658..6031750b 100644
--- a/Game/ClientCard.cs
+++ b/Game/ClientCard.cs
@@ -337,4 +337,4 @@ public bool Equals(ClientCard card)
             return ReferenceEquals(this, card);
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Game/GameAI.cs b/Game/GameAI.cs
index b817941f..82a96eda 100644
--- a/Game/GameAI.cs
+++ b/Game/GameAI.cs
@@ -13,6 +13,7 @@ public class GameAI
         public AIFunctions Utils { get; private set; }
 
         private Dialogs _dialogs;
+        private bool[] noreply;
 
         public GameAI(GameClient game, Duel duel)
         {
@@ -21,6 +22,7 @@ public GameAI(GameClient game, Duel duel)
             Utils = new AIFunctions(duel);
 
             _dialogs = new Dialogs(game);
+            noreply = new bool[16];
         }
 
         /// <summary>
@@ -50,6 +52,31 @@ public void OnJoinGame()
         public void OnStart()
         {
             _dialogs.SendDuelStart();
+            for (int i = 0; i < 16; i += 1)
+            {
+                noreply[i] = false;
+            }
+        }
+
+        /// <summary>
+        /// Called when player send chat message
+        /// </summary>
+        public void OnChat(int player ,string msg,string myname,string speaker)
+        {
+            if (noreply[player])
+                return;
+            if (Duel.Turn > 0 && (player > 0 && !Duel.IsFirst) || (Duel.IsFirst && player == 0))
+            {
+                noreply[player] = true;
+                return;
+            }
+            // if duel has started and speaker is bot itself then do not reply. 
+            if (msg.Contains("[AI]:"))
+            {
+                noreply[player] = true;
+                return;
+            }
+            _dialogs.SendChatReply(Executor.OnChat(player, msg, myname, speaker));
         }
 
         /// <summary>
diff --git a/Game/GameBehavior.cs b/Game/GameBehavior.cs
index 4999b46f..263e82bc 100644
--- a/Game/GameBehavior.cs
+++ b/Game/GameBehavior.cs
@@ -28,6 +28,7 @@ public class GameBehavior
         private bool _debug;        
         private int _select_hint;
         private GameMessage _lastMessage;
+        /*private bool _has_started;*/
 
         public GameBehavior(GameClient game)
         {
@@ -47,6 +48,7 @@ public GameBehavior(GameClient game)
             Deck = Deck.Load(_ai.Executor.Deck);
 
             _select_hint = 0;
+            /*_has_started = false;*/
         }
 
         public int GetLocalPlayer(int player)
@@ -284,10 +286,26 @@ private void OnChat(BinaryReader packet)
         {
             int player = packet.ReadInt16();
             string message = packet.ReadUnicode(256);
+            int real_index = 16;
+            // not start yet
+            if (_duel.Turn == 0) real_index = player;
+            // not tag duel
+            else if (_room.Names[3] == null) real_index = (player > 1) ? player : (
+                    ((_duel.IsFirst ^ (_room.Position == 1))) ? player : player ^ 1);
+            // tag duel
+            else real_index = (player > 3) ? player : (
+                    ((_duel.IsFirst ^ (_room.Position > 1))) ? player : player ^ 2);
+            string speaker = (real_index < 4) ? _room.Names[real_index] : "Unknown";
             string myName = (player != 0) ? _room.Names[1] : _room.Names[0];
             string otherName = (player == 0) ? _room.Names[1] : _room.Names[0];
-            if (player < 4)
-                Logger.DebugWriteLine(otherName + " say to " + myName + ": " + message);
+            Logger.DebugWriteLine(speaker + "(" + real_index.ToString() + ")" + ": " + message);
+            //chat
+            //not reply to bot it self if duel not started. 
+            if (/*!_has_started && */_duel.Turn == 0 && real_index == _room.Position)
+                return;
+            //reply if speaker is not bot itself. 
+
+            _ai.OnChat(player,message,myName,speaker);
         }
 
         private void OnErrorMsg(BinaryReader packet)
@@ -358,6 +376,7 @@ private void OnStart(BinaryReader packet)
 
             Logger.DebugWriteLine("Duel started: " + _room.Names[0] + " versus " + _room.Names[1]);
             _ai.OnStart();
+            /*_has_started = true;*/
         }
 
         private void OnWin(BinaryReader packet)