diff --git a/maubot_llmplus/aibot.py b/maubot_llmplus/aibot.py
index 22b88f2..a5b1ffb 100644
--- a/maubot_llmplus/aibot.py
+++ b/maubot_llmplus/aibot.py
@@ -153,7 +153,7 @@ class AiBotPlugin(AbsExtraConfigPlugin):
         return None
 
     async def _handle_streaming(self, evt: MessageEvent, platform) -> None:
-        # 发送初始占位消息（typing 保持 on，让用户知道正在处理）
+        # 发送初始占位消息；on_message 已设 typing=on，等收到第一个 chunk 再关掉
         placeholder = TextMessageEventContent(
             msgtype=MessageType.TEXT, body="▌", format=Format.HTML, formatted_body="▌"
         )
@@ -163,58 +163,25 @@ class AiBotPlugin(AbsExtraConfigPlugin):
         accumulated = ""
         last_edit_len = 0
         first_chunk = True
-        EDIT_THRESHOLD = 100  # 每积累100个字符更新一次消息
-        heartbeat_stop = asyncio.Event()
-        # 显式锁：序列化心跳和主流的 send_message，防止 mautrix 内部锁冲突
-        send_lock = asyncio.Lock()
+        EDIT_THRESHOLD = 100
 
         async def send_edit(content: TextMessageEventContent) -> None:
-            """顺序发送编辑消息：加用户级锁 + shield，保护 mautrix 内部锁不被 cancel 破坏"""
-            async with send_lock:
-                send_task = asyncio.ensure_future(self.client.send_message(evt.room_id, content))
-                try:
-                    # shield防止wait_for超时cancel send_task本身，避免mautrix锁残留
-                    await asyncio.wait_for(asyncio.shield(send_task), timeout=8.0)
-                except asyncio.TimeoutError:
-                    self.log.debug("Streaming: edit wait_for timed out, awaiting task completion")
-                    await send_task  # send_task仍在运行，等待自然完成
-                except Exception as e:
-                    self.log.warning(f"Streaming: edit error: {e}")
-                    if not send_task.done():
-                        await send_task
-
-        async def _heartbeat():
-            """等待首个 chunk 期间每 5 秒更新占位消息，给用户可见的进度反馈"""
-            dots = 0
-            while True:
-                try:
-                    await asyncio.wait_for(heartbeat_stop.wait(), timeout=5.0)
-                    break  # stop 信号到了，退出
-                except asyncio.TimeoutError:
-                    pass
-                dots = (dots % 3) + 1
-                indicator = "▌" * dots
-                hb = TextMessageEventContent(
-                    msgtype=MessageType.TEXT, body=indicator,
-                    format=Format.HTML, formatted_body=indicator
-                )
-                hb.set_edit(response_event_id)
-                try:
-                    await send_edit(hb)  # 与主流共用同一把锁，保证串行
-                except Exception as e:
-                    self.log.debug(f"Streaming: heartbeat error: {e}")
-
-        heartbeat_task = asyncio.ensure_future(_heartbeat())
+            # shield 防止 wait_for 超时时 cancel send_task，保护 mautrix 内部锁不残留
+            send_task = asyncio.ensure_future(self.client.send_message(evt.room_id, content))
+            try:
+                await asyncio.wait_for(asyncio.shield(send_task), timeout=8.0)
+            except asyncio.TimeoutError:
+                self.log.debug("Streaming: edit timed out, waiting naturally")
+                await send_task
+            except Exception as e:
+                self.log.warning(f"Streaming: edit error: {e}")
+                if not send_task.done():
+                    await send_task
 
         try:
             async for chunk in platform.create_chat_completion_stream(self, evt):
                 if first_chunk:
-                    # 收到第一个 chunk：停止心跳、关掉 typing
-                    heartbeat_stop.set()
-                    try:
-                        await heartbeat_task  # 等心跳当前轮次完成，避免并发
-                    except BaseException:
-                        pass
+                    # 收到第一个 chunk 才关掉 typing，等待期间用户可见 typing 指示器
                     await self.client.set_typing(evt.room_id, timeout=0)
                     first_chunk = False
                 accumulated += chunk
@@ -235,19 +202,11 @@ class AiBotPlugin(AbsExtraConfigPlugin):
             if not accumulated:
                 accumulated = f"Streaming error: {e}"
         finally:
-            # 确保心跳和 typing 无论如何都会停止；BaseException 防止 CancelledError 跳过最终编辑
-            heartbeat_stop.set()
-            if not heartbeat_task.done():
-                try:
-                    await heartbeat_task
-                except BaseException:
-                    pass
             if first_chunk:
                 await self.client.set_typing(evt.room_id, timeout=0)
 
         self.log.debug(f"Streaming: loop done, total={len(accumulated)}")
 
-        # 输出最终完整内容
         if not accumulated:
             accumulated = "（无响应）"
         final_content = TextMessageEventContent(