You need to sign a contract, but it is usually a three-year contract. There is a transition period in the contract, and three or six months is a hesitation period. You can leave at any time, and M can ask you to leave at any time without any compensation. If the hesitation period has passed, you should apply in writing 30 days in advance. If you are fired, M will pay you one month's salary.

You've only been working for a few days, so you can leave anytime. Don't worry, I'll give you money, but you have to return the clothes.