Because in the past, in order to keep the school open, there was generally no access control at the door, so no matter whether outsiders entered the school or students in the school left the school, there would be no clear record. This not only leads to a certain blind spot in the management of students, but also is not conducive to maintaining a good learning atmosphere in schools. Although open schools enable some people to "skip classes" in universities, it is actually not conducive to the maintenance of the school class system. Because students in our school don't respect campus discipline, there will be certain disciplinary risks, but outsiders will basically not bear any consequences when they make trouble in class, and teachers can't control these "truant students".

Because most students can enter and leave the gate freely as long as they brush the entrance guard, the entrance guard is more to prevent outsiders from entering. If the university gate can enter and exit at will, the safety of students is also a very big problem, and the setting of access control can effectively protect the safety of students. Foreigners who want to enter the school must register, which directly excludes some unsafe factors. Moreover, this can also let students have a record of going in and out of school, and also ensure the safety of students at two points.