1. First, open your WeChat in iOS 11 on Apple 13.6 and select " " in the upper right corner, as shown in the picture.
2. Then select "Add Friend" in the drop-down menu that opens, as shown in the figure.
3. Then in the added page that opens, select "Official Account", as shown in the figure.
4. At this time, directly search for "what group" you are interested in. Select the public account you are interested in, follow it, enter the public account, and then apply to join the group.