First of all, I want to know if you have studied it before. Secondly, in the back kitchen of the hotel, in addition to washing dishes, people who feel mixing, chopping boards, steaming pots and cooking are called chefs. I don't know how much you want to learn. If you haven't studied and want to learn to cook, and go out alone, I estimate that it will take more than 4 years according to your good understanding. In addition, there are more than 1000, more than 2000, 4000, 5000 in a month. Some people get more than 10 thousand, even 20 thousand or 30 thousand, so it's hard to say how long you will study, depending on how high your ideal pursuit is.