diff --git a/wechatter/app/routers/wechat.py b/wechatter/app/routers/wechat.py
index 52cedaf..fe78b7e 100644
--- a/wechatter/app/routers/wechat.py
+++ b/wechatter/app/routers/wechat.py
@@ -10,7 +10,7 @@
 from wechatter.message import MessageHandler
 from wechatter.message_forwarder import MessageForwarder
 from wechatter.models.message import Message
-from wechatter.notifier import Notifier
+from wechatter.sender import notify_logged_in, notify_logged_out
 from wechatter.sqlite.sqlite_manager import SqliteManager
 
 router = APIRouter()
@@ -79,10 +79,10 @@ def handle_system_event(content: str) -> None:
     # 判断是否为机器人登录消息
     if content_dict["event"] == "login":
         print("机器人登录成功")
-        Notifier.notify_logged_in()
+        notify_logged_in()
     elif content_dict["event"] == "logout":
         print("机器人已退出登录")
-        Notifier.notify_logged_out()
+        notify_logged_out()
     elif content_dict["event"] == "error":
         pass
     else:
diff --git a/wechatter/commands/_commands/copilot_gpt4.py b/wechatter/commands/_commands/copilot_gpt4.py
index 38f2273..32aefbe 100644
--- a/wechatter/commands/_commands/copilot_gpt4.py
+++ b/wechatter/commands/_commands/copilot_gpt4.py
@@ -1,4 +1,3 @@
-# 使用 Copilot-GPT4-Server 回复
 from typing import List, Union
 
 from loguru import logger
@@ -106,6 +105,7 @@ def _gptx(model: str, to: SendTo, message: str = "") -> None:
     chat_info = CopilotGPT4.get_chating_chat_info(wx_id, model)
     if message == "":  # /gpt4
         # 判断对话是否有效
+        _send_text_msg(to, "正在创建新对话...")
         if chat_info is None or CopilotGPT4.is_chat_valid(chat_info):
             CopilotGPT4.create_chat(wx_id=wx_id, model=model)
             logger.info("创建新对话成功")
@@ -115,6 +115,7 @@ def _gptx(model: str, to: SendTo, message: str = "") -> None:
         _send_text_msg(to, "对话未开始，继续上一次对话")
     else:  # /gpt4 <message>
         # 如果没有对话记录，则创建新对话
+        _send_text_msg(to, f"正在调用 {model} 进行对话...")
         if chat_info is None:
             chat_info = CopilotGPT4.create_chat(wx_id=wx_id, model=model)
             logger.info("无历史对话记录，创建新对话成功")
@@ -159,6 +160,7 @@ def _gptx_continue(model: str, to: SendTo, message: str = "") -> None:
         logger.info("请输入对话记录编号")
         _send_text_msg(to, "请输入对话记录编号")
         return
+    _send_text_msg(to, f"正在切换到对话记录 {message}...")
     chat_info = CopilotGPT4.continue_chat(
         wx_id=wx_id, model=model, chat_index=int(message)
     )
diff --git a/wechatter/message/message_parser.py b/wechatter/message/message_parser.py
index eebc03a..ee62461 100644
--- a/wechatter/message/message_parser.py
+++ b/wechatter/message/message_parser.py
@@ -6,7 +6,6 @@
 import wechatter.config as config
 from wechatter.bot.bot_info import BotInfo
 from wechatter.models.message import Message, SendTo
-from wechatter.notifier import Notifier
 
 
 class MessageHandler:
@@ -41,9 +40,6 @@ def handle_message(self, message: Message) -> None:
         to = SendTo(message.source)
 
         # 是命令消息
-        # 回复消息已收到
-        Notifier.notify_received(to)
-
         # 开始处理命令
         cmd_handler = cmd_dict["handler"]
         if cmd_handler is not None:
diff --git a/wechatter/notifier.py b/wechatter/notifier.py
deleted file mode 100644
index 4644ef9..0000000
--- a/wechatter/notifier.py
+++ /dev/null
@@ -1,31 +0,0 @@
-# 消息通知器
-from wechatter.models.message import SendMessage, SendMessageType, SendTo
-from wechatter.sender import Sender
-
-
-class Notifier:
-    """消息通知器，用于发送非命令产生的消息"""
-
-    def __init__(self):
-        pass
-
-    # TODO: 改成只在为API请求的命令时才调用
-    @staticmethod
-    def notify_received(to: SendTo) -> None:
-        """通知收到命令请求"""
-        msg = "收到命令请求"
-        Sender.send_msg(to, SendMessage(SendMessageType.TEXT, msg))
-
-    # 机器人登录登出通知，若是登录（登出）则发送登录（登出）消息给所有管理员
-    @staticmethod
-    def notify_logged_in() -> None:
-        """通知登录成功"""
-        msg = "微信机器人启动成功"
-        Sender.send_msg_to_admins(msg)
-
-    # FIXME: 登出消息发送不出去，因为发消息时候，机器人已经退出登录了
-    @staticmethod
-    def notify_logged_out() -> None:
-        """通知已退出登录"""
-        msg = "微信机器人已退出"
-        Sender.send_msg_to_admins(msg)
diff --git a/wechatter/sender/__init__.py b/wechatter/sender/__init__.py
index 53f54e1..28ded72 100644
--- a/wechatter/sender/__init__.py
+++ b/wechatter/sender/__init__.py
@@ -1,3 +1,6 @@
+# isort: off
 from .sender import Sender
+from .notifier import notify_logged_in, notify_logged_out, notify_received
+# isort: on
 
-__all__ = ["Sender"]
+__all__ = ["Sender", "notify_received", "notify_logged_in", "notify_logged_out"]
diff --git a/wechatter/sender/notifier.py b/wechatter/sender/notifier.py
new file mode 100644
index 0000000..e7de822
--- /dev/null
+++ b/wechatter/sender/notifier.py
@@ -0,0 +1,23 @@
+# 消息通知器
+from wechatter.models.message import SendMessage, SendMessageType, SendTo
+from wechatter.sender import Sender
+
+
+def notify_received(to: SendTo) -> None:
+    """通知收到命令请求"""
+    msg = "收到命令请求"
+    Sender.send_msg(to, SendMessage(SendMessageType.TEXT, msg))
+
+
+# 机器人登录登出通知，若是登录（登出）则发送登录（登出）消息给所有管理员
+def notify_logged_in() -> None:
+    """通知登录成功"""
+    msg = "微信机器人启动成功"
+    Sender.send_msg_to_admins(msg)
+
+
+# FIXME: 登出消息发送不出去，因为发消息时候，机器人已经退出登录了
+def notify_logged_out() -> None:
+    """通知已退出登录"""
+    msg = "微信机器人已退出"
+    Sender.send_msg_to_admins(msg)