In the university, there is a special commercial street. As long as it is legal and has a storefront, it can be legally operated through school audit. If there is no aunt outside the store, you can't set up a stall to sell things at school without the permission of the school. If you are a student, the circle of friends on WeChat QQ is so convenient now, and it is ok to be a second-hand goods exchange group of WeChat business.