1. To obtain the group number, you need to obtain the group number of the parent group. You can consult the relevant personnel of Peking University or share the invitation link with other parents.

2. Apply for membership. After obtaining the group number, click on the group number and apply to join through social software such as WeChat or QQ.

2. After submitting the application, you need to wait for the approval of the administrator before you can join the group. After approval, you will be notified to join the group.