又更新了，撤回消息有大变化！

Group 1 - The core point of the article is the introduction of a new feature in WeChat that allows users to recall all messages sent in a single action, enhancing the efficiency of message management [3][4]. - The new recall options include "Recall this message" and "Recall all messages sent in this session," which simplifies the process of retracting multiple messages at once [4][6]. - Currently, this feature is in a limited gray testing phase, available to only a small number of users [6]. Group 2 - Different message types have varying recall time limits: text messages can be recalled within 2 minutes, while files like Word, Excel, and PDFs can be recalled within 3 hours [6]. - Users can send images in a way that allows for recall beyond the 2-minute limit by sending them as files, which can be recalled within 3 hours [7][12].