First of all, this kind of self-help, students choose their favorite meals, so that we can try to avoid the waste of that kind of food and make a contribution to our CD-ROM action. In this case, it actually has an environmental protection function.
Secondly, for schools, our self-help behavior actually reduces the conflict of people flow.
Anyway, everyone can go to the buffet whenever they come, and there is no need to eat it after class.
Third, the promotion of our society is actually a good direction. Buffet, as long as you pay the right money, everyone will be more welcome.