According to the relevant information of the inquiry, it is not easy to do. It is necessary to sell the course through outbound/call consultation, give industry consultation to the parents of the students, invite parents to join the WeChat group, and be responsible for the maintenance of the initial parents. Call students' parents regularly to collect their suggestions on courses and teaching. I have to answer the phone and go out for an interview. Time is unstable and it is difficult to do so.