You can use the "tag" function of mobile phone WeChat to group your friends.

The specific setting method is as follows

1. Open the mobile phone WeChat, click "Address Book", and then click "Label" on the page.

2. Click the "New" button in the upper right corner of the "All Tags" page:

3. Select friends to be assigned to the same group from the contact list on the Select Contact page, and then click OK:

4. Give the friends in this group a "tagname" and click "Save":

5. Group other friends according to the above steps.