Our school is open (it should be said that most universities are). I have heard of people fighting outside the school, and there are often various cars passing by during school hours. The student flow is large, which is particularly prone to congestion and collision accidents! Sometimes when you are walking normally, you suddenly jump out of a car, which is really unfriendly!
It is advisable to open in different periods, otherwise it will be very troublesome to take out food or something, won't it?