Or other people can join your group chat, but they must be that person's good friends.
Search the internet for groups you are interested in. They will leave the QR code of the WeChat group and scan the QR code to join the group.
Create a group by yourself.
To pull others into the WeChat group:
1. Log in to WeChat, and click on the WeChat group you want to pull others into.
2. Click the icon on the upper right to enter.
3. Click the plus icon.
4. Click on the friend you want to add, and then click "OK" at the top right to add others to the WeChat group.