2. Go to Baidu Post Bar and Weibo to directly search WeChat group. Someone will leave a QR code. Then you can join the group by sweeping it. But the disadvantage may be that the QR code will be invalid after more than seven days, or people who exceed 100 will not be able to scan it.
3. It is a professional WeChat group navigation website, which updates a large number of WeChat group QR codes every day. And there will be information about the owner. If you can't scan, you can add the micro-signal of the group owner. The group owner pulled you into the group.