Shanghai's real estate is exhausted.

If the working hours exceed 8 hours every day, the company shall pay 150% overtime pay, 200% overtime pay on Saturdays and Sundays, 300% overtime pay on statutory holidays and 300% overtime pay on paid annual leave. It is illegal to charge depreciation for clothes, and then the labor inspection department will report it. If overtime pay is not paid, then labor arbitration will claim rights.

Personally, security is not a good career. If you are young, I suggest you learn some skills and become a skilled worker with high income.