1, the state expressly stipulates that university teachers do not have to work;

2. University teachers have dual identities, both educators and researchers. They need to have enough time to do scientific research, otherwise there will be no time in class.

3. College students are generally adults, and have certain emergency ability and social experience. Different from junior high school students and senior high school students, they lack social experience and self-care ability, which requires the unified management of class teachers. Moreover, college students can better manage their own lives without teachers.