Wechat groups cannot send messages anonymously. By anonymous messages, you should mean that you can't see other people's nicknames. This function can be set in the group.
1. Open the wechat group chat interface and click the icon in the upper right corner.
2. After entering, you can see the nickname of group members. If it is checked, you can see who is speaking; If it is not checked, it cannot be seen.
Note: wechat group has no anonymity function.