1. I believe that many times at school, people are lazy and don't want to go downstairs to buy food by themselves. At this time, you can use this time to help your classmates bring food. Generally 0.5- 1 yuan. You can discuss with your classmates to help him buy 3-4 copies at a time, so you can finish it in ten minutes without delaying yourself and earn a refund.
2. You can hoard some snacks yourself and sell them in other bedrooms at night. It's not too expensive, and it's best to have a price acceptable to everyone. Because students are still in the growth stage, there is a great demand for things.
3. Students who like cosplay can go to some part-time exhibitions on weekends. The commission for a cosplay will range from 200 to 600, which is something that a few students can go to.
4. Then there are part-time waiters, tea shops and snack bars. These or some weddings will require some temporary workers. Although it is a little hard, you can also experience the different life atmosphere of the school.
Don't forget your studies when you do these things. I wish you better and better grades! Come on!