Because selling small commodities at school is actually very profitable. When I was in college, I used to treat my dormitory as a grocery store and sell many small commodities. Basically, I can earn thousands of dollars a month, which I think is quite good. The most important thing is to do it with your roommates and turn your dormitory into your grocery store. Otherwise, if you regard the dormitory as your grocery store, it is easy to cause dissatisfaction among dormitory members and lead to disharmony in dormitory relations, so this is very important.

Like when I was a sophomore, I bought some things that I might use as a freshman, such as quilts, mattresses, pillows and so on. At the beginning of school, I asked freshmen if they had anything to buy, so they could come to our dormitory and have a look. I basically earned nearly 654.38 million in that month, so this is why many people are willing to stay in the dormitory. It is much more profitable and more free than doing part-time jobs outside. If you don't want to work one day, you can close the door for one day. Later, I began to cook food, because daily necessities are not available every day, but food is available. At that time, we provided some instant noodles, ham and the like. Every night, many people basically choose to buy in our dormitory or let us run errands. We usually need to add a delivery fee of one or two yuan.

To sum up, this is why many seniors like to sell some small commodities, because it is still a profitable business for students, so many people will want to make money in this way.