Generally, there are school-surrounding custody, student custody, also known as after-school custody, holiday custody, after-school synchronous counseling and so on. Mainly for primary and secondary school students, because parents don't have the time, energy and professional qualifications to educate their children, they entrust third-party educational institutions to coach and train their children's study and living habits. Generally speaking, student trusteeship is based on the purpose of serving parents and educating students, which well expands and supplements the comprehensive, balanced and high-quality education that school education lacks and is difficult to meet.