I did receive an invitation from the math teacher to form a team. According to the relevant public information, I learned that I received a membership number, which was invited by the teacher to join. Nail conference number refers to a group entry password provided by teachers or student cadres. You can enter it if you enter it correctly. Video conference has a string of digital membership passwords. If you need to add others to join the video conference, click the member icon in the upper right corner of the conference interface and share it with the attendees who need to attend. Participants can enter the membership password when entering the meeting.