diff --git a/EvoScientist/channels/wechat/channel.py b/EvoScientist/channels/wechat/channel.py
index a97c5d8..4c2fbb6 100644
--- a/EvoScientist/channels/wechat/channel.py
+++ b/EvoScientist/channels/wechat/channel.py
@@ -337,12 +337,20 @@ class WeChatChannel(Channel, WebhookMixin, TokenMixin):
                 logger.error(f"WeChat decrypt failed: {e}")
                 return web.Response(status=500)
 
-        # Route to backend-specific handler
-        await self._process_message(xml_data)
+        # Process message asynchronously — WeCom requires a response within
+        # 5 seconds, but media downloads can take much longer.  Return
+        # "success" immediately and handle the message in the background.
+        asyncio.create_task(self._safe_process_message(xml_data))
 
-        # Return "success" to acknowledge receipt (async reply via API)
         return web.Response(text="success")
 
+    async def _safe_process_message(self, xml_data: dict[str, str]) -> None:
+        """Wrapper that catches exceptions so fire-and-forget tasks don't leak."""
+        try:
+            await self._process_message(xml_data)
+        except Exception:
+            logger.exception("Error processing WeChat message")
+
     async def _process_message(self, xml_data: dict[str, str]) -> None:
         """Process a parsed XML message from WeChat/WeCom callback."""
         msg_type = xml_data.get("MsgType", "")
@@ -436,7 +444,7 @@ class WeChatChannel(Channel, WebhookMixin, TokenMixin):
             text = f"[位置] {label} ({lat}, {lon})"
         elif msg_type == "file":
             media_id = xml_data.get("MediaId", "")
-            file_name = xml_data.get("Title", f"wechat_file_{msg_id}")
+            file_name = xml_data.get("FileName", "") or xml_data.get("Title", f"wechat_file_{msg_id}")
             logger.info(f"WeChat file message: name={file_name}, media_id={media_id!r}, keys={list(xml_data.keys())}")
             if media_id:
                 local, ann = await self._download_wechat_media(
diff --git a/botpy.log b/botpy.log
new file mode 100644
index 0000000..b43c983
--- /dev/null
+++ b/botpy.log
@@ -0,0 +1,18 @@
+2026-02-15 13:46:42,249	[INFO]	(client.py:162)_bot_login	[botpy] 登录机器人账号中...
+2026-02-15 13:46:42,535	[INFO]	(robot.py:65)update_access_token	[botpy] access_token expires_in 7200
+2026-02-15 13:46:43,622	[INFO]	(client.py:181)_bot_init	[botpy] 程序启动...
+2026-02-15 13:46:43,623	[INFO]	(connection.py:60)multi_run	[botpy] 最大并发连接数: 1, 启动会话数: 1
+2026-02-15 13:46:43,623	[INFO]	(client.py:242)bot_connect	[botpy] 会话启动中...
+2026-02-15 13:46:43,623	[INFO]	(gateway.py:115)ws_connect	[botpy] 启动中...
+2026-02-15 13:46:43,792	[INFO]	(gateway.py:142)ws_identify	[botpy] 鉴权中...
+2026-02-15 13:46:43,915	[INFO]	(gateway.py:85)on_message	[botpy] 机器人「EvoSci-测试中」启动成功！
+2026-02-15 13:46:43,916	[INFO]	(gateway.py:223)_send_heart	[botpy] 心跳维持启动...
+2026-02-15 13:57:47,578	[INFO]	(client.py:162)_bot_login	[botpy] 登录机器人账号中...
+2026-02-15 13:57:47,775	[INFO]	(robot.py:65)update_access_token	[botpy] access_token expires_in 6535
+2026-02-15 13:57:48,887	[INFO]	(client.py:181)_bot_init	[botpy] 程序启动...
+2026-02-15 13:57:48,888	[INFO]	(connection.py:60)multi_run	[botpy] 最大并发连接数: 1, 启动会话数: 1
+2026-02-15 13:57:48,888	[INFO]	(client.py:242)bot_connect	[botpy] 会话启动中...
+2026-02-15 13:57:48,888	[INFO]	(gateway.py:115)ws_connect	[botpy] 启动中...
+2026-02-15 13:57:49,073	[INFO]	(gateway.py:142)ws_identify	[botpy] 鉴权中...
+2026-02-15 13:57:49,294	[INFO]	(gateway.py:85)on_message	[botpy] 机器人「EvoSci-测试中」启动成功！
+2026-02-15 13:57:49,295	[INFO]	(gateway.py:223)_send_heart	[botpy] 心跳维持启动...