Jinan ktv works part-time in 200 yuan for one night, and needs to pay a deposit and work 30 times. Is this reliable?

Personally, I feel unreliable. Generally speaking, a part-time job does not require a deposit. Besides, I think 200 yuan has a problem for one night. I don't know what happened inside. You'd better be careful, or you can ask the relevant KTV staff, and you can get the results you want from their manners (be careful not to ask too directly, so as not to arouse some doubts of the staff there). I hope my above can help you solve your current doubts.