College students generally do the first two categories!
The first category, education-related, tutor.
If you decide to be a tutor, you can find two jobs and go out to teach two days a week, charging 80 to 200 per hour, and earning almost 300 to 800 a day. It depends on your level. If it's an Olympic math or something, you can charge 200, and generally it's almost 80. Then the weekly income is 600~ 1600.
One semester, working 16 weeks, earning about 96 million to 20 thousand. If you can be a full-time tutor in winter and summer vacation, then suppose you earn 300 yuan every day for 30 days in summer vacation, which is almost 9000 yuan.
Of course, if you find it inconvenient to find customers, you can entrust an intermediary to introduce you, giving the intermediary almost 2000 yuan.
The second category, product related, is sales.
If tutoring can't be done, try to find a sales type. You can earn 200 to 500 on weekends, 3,200 to 8,000 after 16 weeks, and 3,000 to 8,000 by working 30 days a day in summer vacation.
Sales depend on performance, not as stable as tutoring, but there are still some opportunities to earn more.
There is a third category, depending on your own specialty.
For example, models (looking at looks), or choosing to start a business to sell things (cost price), or choosing to deliver food to a nearby restaurant at an appointed time every week (manual labor), or PS is good at (looking at technology), or programming (it's really hard to find here).