You can apply for a part-time job at Dicos in summer. Generally, part-time job is to provide on-site service for cleaning, deliver takeout (take-out is in German currency, and you can change a large row for free when you collect ten yuan, which is very cool), and then send dm (that is, send coupons). In fact, everything is very tiring, but after going through it, you will gain something. I wish you an ideal part-time job soon.