diff --git a/src/chat/message_receive/chat_stream.py b/src/chat/message_receive/chat_stream.py
index 53ebd502..18682502 100644
--- a/src/chat/message_receive/chat_stream.py
+++ b/src/chat/message_receive/chat_stream.py
@@ -142,46 +142,98 @@ class ChatManager:
         Returns:
             ChatStream: 聊天流对象
         """
-        # 生成stream_id
-        try:
-            stream_id = self._generate_stream_id(platform, user_info, group_info)
+        stream_id = self._generate_stream_id(platform, user_info, group_info)
 
-            # 检查内存中是否存在
-            if stream_id in self.streams:
-                stream = self.streams[stream_id]
-                # 更新用户信息和群组信息
-                stream.update_active_time()
-                stream = copy.deepcopy(stream)
-                stream.user_info = user_info
-                if group_info:
-                    stream.group_info = group_info
-                return stream
+        # mes_name: 当前调用此函数时，根据传入参数确定的最新聊天名称
+        current_mes_name = None
+        if group_info and group_info.group_name:
+            current_mes_name = group_info.group_name
+        elif user_info and user_info.user_nickname: # private chat
+            current_mes_name = f"{user_info.user_nickname}的私聊"
 
-            # 检查数据库中是否存在
-            data = db.chat_streams.find_one({"stream_id": stream_id})
-            if data:
-                stream = ChatStream.from_dict(data)
-                # 更新用户信息和群组信息
-                stream.user_info = user_info
+        # 检查内存中是否存在
+        if stream_id in self.streams:
+            stream_instance = self.streams[stream_id] # 获取内存中的实际stream对象
+
+            # stream_name: 从内存中获取的、可能存在的旧名称，用于比较
+            # 这个名称是 get_stream_name() 在此函数更新stream_instance前会返回的名称
+            old_effective_stream_name = None
+            if stream_instance.group_info and stream_instance.group_info.group_name:
+                old_effective_stream_name = stream_instance.group_info.group_name
+            elif stream_instance.user_info and stream_instance.user_info.user_nickname:
+                old_effective_stream_name = f"{stream_instance.user_info.user_nickname}的私聊"
+
+            # 判断名称是否发生变化
+            if current_mes_name is not None and old_effective_stream_name != current_mes_name:
+                logger.info(f"聊天流名称变更 (来自内存): ID '{stream_id}' 从 '{old_effective_stream_name}' 变为 '{current_mes_name}'. 更新数据库.")
+                # 更新内存中的stream_instance对象的 用户信息和群组信息（这将包含新的名称）
+                stream_instance.user_info = user_info
                 if group_info:
-                    stream.group_info = group_info
-                stream.update_active_time()
+                    stream_instance.group_info = group_info
+                else: # 处理从群聊变私聊或群信息消失的情况
+                    stream_instance.group_info = None
+                stream_instance.update_active_time() # 更新活跃时间也会将saved标记为False
+                await self._save_stream(stream_instance) # 保存更新到数据库
             else:
-                # 创建新的聊天流
-                stream = ChatStream(
-                    stream_id=stream_id,
-                    platform=platform,
-                    user_info=user_info,
-                    group_info=group_info,
-                )
-        except Exception as e:
-            logger.error(f"创建聊天流失败: {e}")
-            raise e
+                # 名称未变或无法确定当前新名称，仅更新活动时间和确保信息最新
+                stream_instance.user_info = user_info
+                if group_info:
+                    stream_instance.group_info = group_info
+                else:
+                    stream_instance.group_info = None
+                stream_instance.update_active_time()
 
-        # 保存到内存和数据库
-        self.streams[stream_id] = stream
-        await self._save_stream(stream)
-        return copy.deepcopy(stream)
+            # self.streams[stream_id] 已经是更新后的 stream_instance
+            return copy.deepcopy(self.streams[stream_id]) # 返回一个副本，避免外部直接修改缓存
+
+        # 检查数据库中是否存在
+        data = db.chat_streams.find_one({"stream_id": stream_id})
+        if data:
+            stream_from_db = ChatStream.from_dict(data)
+
+            # stream_name: 从数据库加载的、可能存在的旧名称，用于比较
+            db_stream_name = None
+            if stream_from_db.group_info and stream_from_db.group_info.group_name:
+                db_stream_name = stream_from_db.group_info.group_name
+            elif stream_from_db.user_info and stream_from_db.user_info.user_nickname:
+                db_stream_name = f"{stream_from_db.user_info.user_nickname}的私聊"
+
+            # 判断名称是否发生变化
+            if current_mes_name is not None and db_stream_name != current_mes_name:
+                logger.info(f"聊天流名称变更 (来自数据库): ID '{stream_id}' 从 '{db_stream_name}' 变为 '{current_mes_name}'. 更新数据库.")
+                # 更新从数据库加载的stream对象的 用户信息和群组信息
+                stream_from_db.user_info = user_info
+                if group_info:
+                    stream_from_db.group_info = group_info
+                else:
+                    stream_from_db.group_info = None
+                # stream_from_db.update_active_time() # 将在下面统一处理
+                # stream_from_db.saved = False # update_active_time会处理
+
+            # 统一更新信息和活跃时间
+            stream_from_db.user_info = user_info
+            if group_info:
+                stream_from_db.group_info = group_info
+            else:
+                stream_from_db.group_info = None
+            stream_from_db.update_active_time()
+
+            self.streams[stream_id] = stream_from_db # 存入内存缓存
+            await self._save_stream(stream_from_db) # 保存到数据库（如果名称变化或活跃时间更新）
+            return copy.deepcopy(stream_from_db)
+
+        # 创建新的聊天流
+        # 此时，新流的名称自然就是 current_mes_name
+        new_stream = ChatStream(
+            stream_id=stream_id,
+            platform=platform,
+            user_info=user_info,
+            group_info=group_info,
+        )
+        self.streams[stream_id] = new_stream
+        await self._save_stream(new_stream)
+        logger.info(f"创建了新的聊天流: ID '{stream_id}', 名称 '{current_mes_name if current_mes_name else '未知'}'")
+        return copy.deepcopy(new_stream)
 
     def get_stream(self, stream_id: str) -> Optional[ChatStream]:
         """通过stream_id获取聊天流"""
@@ -229,4 +281,4 @@ class ChatManager:
 
 
 # 创建全局单例
-chat_manager = ChatManager()
+chat_manager = ChatManager()
\ No newline at end of file
diff --git a/src/experimental/Legacy_HFC/heartflow_processor.py b/src/experimental/Legacy_HFC/heartflow_processor.py
index 9e27a24b..6589642f 100644
--- a/src/experimental/Legacy_HFC/heartflow_processor.py
+++ b/src/experimental/Legacy_HFC/heartflow_processor.py
@@ -210,7 +210,7 @@ class HeartFCProcessor:
 
             # 7. 日志记录
             mes_name = chat.group_info.group_name if chat.group_info else "私聊"
-            current_time = time.strftime("%H点%M分%S秒", time.localtime(message.message_info.time))
+            current_time = time.strftime("%H:%M:%S", time.localtime(message.message_info.time))
             logger.info(
                 f"[{current_time}][{mes_name}]"
                 f"{userinfo.user_nickname}:"