官宣！微信上线三大功能

Group 1 - The core functionality of WeChat now allows users to recall all sent messages at once, including multi-selected forwarded messages, images, videos, and files, enhancing user convenience [4] - Users can selectively receive important notifications in group chats even when they have muted notifications, by choosing specific alerts such as "mentions" and "group announcements" [6] - A new option has been introduced that allows users to delete a contact while retaining the chat history, providing flexibility in managing contacts and conversations [9]