Your situation is similar to our school. I have been in school for four years, and I will tell you all about what that store sells.

Sell newspapers and magazines, rent martial arts books, spend money, handle mobile services, handle broadband services, sell game cards, sell exam books, such as Band 4 and Band 6, and sell teaching AIDS, such as after-school tutoring books for advanced mathematics. I feel that 20 thousand a year is a small amount, because these are very profitable and there are many people. You can earn at least 20 thousand a year by charging the phone bill!

Doing campus mobile, broadband agents are very profitable.

That store in our school is only 10 square meter, and it can earn several W a year!

Of course, you can also sell other things according to the situation of your school.