diff --git a/GameServer/Game/Player/PlayerInstance.cs b/GameServer/Game/Player/PlayerInstance.cs
index 6a66e54..7fc72f0 100644
--- a/GameServer/Game/Player/PlayerInstance.cs
+++ b/GameServer/Game/Player/PlayerInstance.cs
@@ -196,7 +196,7 @@ public class PlayerInstance(PlayerGameData data)
         return proto;
     }
 
-    public Proto.Player ToPlayerProto()
+    public Proto.Player ToPlayerProto(bool includeSupportCards = true)
     {
         BuildPlayerAttr();
         var displayName = PlayerGameData.NormalizeDisplayName(Data.Name);
@@ -217,7 +217,10 @@ public class PlayerInstance(PlayerGameData data)
         foreach (var item in InventoryManager.InventoryData.Items.Values) proto.Items.Add(item.ToProto());
         foreach (var skin in InventoryManager.InventoryData.Skins.Values) proto.Items.Add(skin.ToProto());
         foreach (var weapon in InventoryManager.InventoryData.Weapons.Values) proto.Items.Add(weapon.ToProto());
-        foreach (var card in InventoryManager.InventoryData.SupportCards.Values) proto.Items.Add(card.ToProto());
+        if (includeSupportCards)
+        {
+            foreach (var card in InventoryManager.InventoryData.SupportCards.Values) proto.Items.Add(card.ToProto());
+        }
         foreach (var x in Data.Attrs)
         {
             uint gid = x.Gid;
diff --git a/GameServer/Server/Packet/Recv/Login/HandlerReqLogin.cs b/GameServer/Server/Packet/Recv/Login/HandlerReqLogin.cs
index 5f719ce..c889609 100644
--- a/GameServer/Server/Packet/Recv/Login/HandlerReqLogin.cs
+++ b/GameServer/Server/Packet/Recv/Login/HandlerReqLogin.cs
@@ -21,6 +21,7 @@ namespace MikuSB.GameServer.Server.Packet.Recv.Login;
 public class HandlerReqLogin : Handler
 {
     private static readonly Logger Logger = new("ReqLogin");
+    private const int SupportCardLoginSplitThreshold = 2000;
 
     private static string? ExtractSdkAuthToken(string? token)
     {
@@ -80,7 +81,10 @@ public class HandlerReqLogin : Handler
             $"Debug-{DateTime.Now:yyyy-MM-dd HH-mm-ss}.log");
         await connection.Player.OnEnterGame();
         connection.Player.Connection = connection;
-        await connection.SendPacket(new PacketRspLogin(connection.Player!));
+        var splitSupportCards = connection.Player.InventoryManager.InventoryData.SupportCards.Count > SupportCardLoginSplitThreshold;
+        await connection.SendPacket(new PacketRspLogin(connection.Player!, !splitSupportCards));
+        if (splitSupportCards)
+            await SendSupportCardsOnLogin(connection);
         await connection.SendPacket(new PacketNtfCallScript(connection.Player!));
         await SendDebugLoginState(connection);
 
@@ -90,6 +94,22 @@ public class HandlerReqLogin : Handler
         await SendGirlSkinTypeOnLogin(connection);
     }
 
+    private static async Task SendSupportCardsOnLogin(Connection connection)
+    {
+        var player = connection.Player;
+        if (player == null)
+            return;
+
+        var supportCards = player.InventoryManager.InventoryData.SupportCards.Values.ToList();
+        Logger.Info($"Split support card sync on login: total={supportCards.Count}, chunkSize={SupportCardLoginSplitThreshold}");
+
+        foreach (var chunk in supportCards.Chunk(SupportCardLoginSplitThreshold))
+        {
+            var packet = new PacketNtfCallScript(chunk.ToList());
+            await connection.SendPacket(packet);
+        }
+    }
+
     private static void ApplySavedGirlSkinTypes(PlayerInstance player)
     {
         var inventoryData = player.InventoryManager.InventoryData;
diff --git a/GameServer/Server/Packet/Send/Login/PacketRspLogin.cs b/GameServer/Server/Packet/Send/Login/PacketRspLogin.cs
index c3bec83..45805bc 100644
--- a/GameServer/Server/Packet/Send/Login/PacketRspLogin.cs
+++ b/GameServer/Server/Packet/Send/Login/PacketRspLogin.cs
@@ -10,18 +10,41 @@ public class PacketRspLogin : BasePacket
 {
     private static readonly Logger Logger = new("RspLogin");
 
-    public PacketRspLogin(PlayerInstance player) : base(CmdIds.RspLogin)
+    public PacketRspLogin(PlayerInstance player, bool includeSupportCards = true) : base(CmdIds.RspLogin)
     {
+        var characterCount = player.CharacterManager.CharacterData.Characters.Count;
+        var itemCount = player.InventoryManager.InventoryData.Items.Count;
+        var skinCount = player.InventoryManager.InventoryData.Skins.Count;
+        var weaponCount = player.InventoryManager.InventoryData.Weapons.Count;
+        var supportCardCount = player.InventoryManager.InventoryData.SupportCards.Count;
+        var attrCount = player.Data.Attrs.Count;
+        var strAttrCount = player.Data.StrAttrs.Count;
+        var showItemCount = player.Data.ShowItems.Count;
+
         var proto = new RspLogin
         {
             Timestamp = (uint)Extensions.GetUnixSec(),
             WorldChannel = 1,
             AreaId = 1,
-            Data = player.ToPlayerProto(),
+            Data = player.ToPlayerProto(includeSupportCards),
             NeedRename = false
         };
 
         var bytes = Google.Protobuf.MessageExtensions.ToByteArray(proto);
+        Logger.Info(
+            "RspLogin content: " +
+            $"characters={characterCount}, " +
+            $"items={itemCount}, " +
+            $"skins={skinCount}, " +
+            $"weapons={weaponCount}, " +
+            $"supportCards={supportCardCount}, " +
+            $"supportCardsInRspLogin={(includeSupportCards ? supportCardCount : 0)}, " +
+            $"attrs={attrCount}, " +
+            $"strAttrs={strAttrCount}, " +
+            $"showItems={showItemCount}, " +
+            $"protoItems={proto.Data.Items.Count}, " +
+            $"protoAttrs={proto.Data.Attrs.Count}, " +
+            $"protoStrAttrs={proto.Data.StrAttrs.Count}");
         Logger.Info($"RspLogin proto size: {bytes.Length} bytes");
 
         SetData(bytes);