The assembler knows. Come in and talk.

First of all, the fitter's work is dirty and tired. You should first consider whether you are competent or not. No one can guarantee how long you will study. It depends on how you and others teach you and how far you want to go! According to the society, the salary should be good. Take the wages of ordinary locksmiths as an example, which is at least about 3500 lower than that of Guangdong!