diff --git a/Lagrange.XocMat/Event/TerrariaMsgReceiveHandler.cs b/Lagrange.XocMat/Event/TerrariaMsgReceiveHandler.cs
index b854213..58a9a9f 100644
--- a/Lagrange.XocMat/Event/TerrariaMsgReceiveHandler.cs
+++ b/Lagrange.XocMat/Event/TerrariaMsgReceiveHandler.cs
@@ -15,6 +15,7 @@
 using Lagrange.XocMat.Internal.Socket.PlayerMessage;
 using Lagrange.XocMat.Internal.Socket.ServerMessage;
 using Lagrange.XocMat.Net;
+using Lagrange.XocMat.Utility;
 using Microsoft.Extensions.Logging;
 using ProtoBuf;
 using System.Reactive.Linq;
@@ -253,6 +254,17 @@ internal async void GroupMessageForwardAdapter(BotContext bot, GroupMessageEvent
         {
             return;
         }
+        var file = args.Chain.GetFile();
+        if (file != null && file.FileSize < 1024 * 1024 * 30)
+        { 
+            foreach(var setting in XocMatSetting.Instance.Servers)
+            {
+                if (file.FileUrl != null && setting != null && setting.Groups.Contains(Convert.ToUInt32(args.Chain.GroupUin)) && setting.WaitFile != null)
+                {
+                    setting.WaitFile.SetResult(await HttpUtils.HttpGetByte(file.FileUrl));
+                }
+            }
+        }
         var text = args.Chain.GetText();
         if (string.IsNullOrEmpty(text))
             return;
diff --git a/Lagrange.XocMat/Extensions/MessageChainExt.cs b/Lagrange.XocMat/Extensions/MessageChainExt.cs
index b6f9cd3..539860c 100644
--- a/Lagrange.XocMat/Extensions/MessageChainExt.cs
+++ b/Lagrange.XocMat/Extensions/MessageChainExt.cs
@@ -22,6 +22,6 @@ public static string GetText(this MessageChain chain)
 
     public static FileEntity? GetFile(this MessageChain chain)
     {
-        return (FileEntity)chain.Where(c => c is FileEntity).First();
+        return (FileEntity?)chain.Where(c => c is FileEntity).FirstOrDefault();
     }
 }