Update app.py

app.py

@@ -250,7 +250,13 @@ def supabase_fetch_user(user_name):
     
 
 def get_completion(message,history):
-    return "**Important Announcement:**  \n\nThis space is shutting down now. \n\nVisit [chatgpt-4o](https://chatgpt-4o.streamlit.app/) for an improved UI experience and future enhancements."
+    res =  """
+    **Important Announcement:**  \n\nThis space is shutting down now. \n\nVisit [chatgpt-4o](https://chatgpt-4o.streamlit.app/) for an improved UI experience and future enhancements.
+    \n\n
+
+    **重要提示：\n该服务已暂停，前往[chatgpt-4o](https://chatgpt-4o.streamlit.app/)体验全新的GPT4聊天，新的服务未来会加入更多功能！**
+    """
+    return res
 
 
 """