Students can't go out when the school is closed. If you are a teacher, you should be able to go in. Other students from other schools can't go in.
Compared with primary and secondary schools and kindergartens, colleges and universities are more dense: several people share a dormitory, dozens of people share a class, thousands of people use the canteen, and the first floor of the dormitory uses a water room and bathroom. Once there is a case in the school, it is very likely that an epidemic will break out. The purpose of implementing unit management in colleges and universities is to trace the source of problems as soon as possible, determine the risk range and minimize the impact on the health of teachers and students.