This depends on the person. If Xiao Bai comes, he will study for a longer time, three or four months, and learn the basic knowledge faster, one or two months. I just want to know something systematically, and then I can go to work as soon as possible. I have been studying for a week now, and I should continue to study after work. And their courses are set up step by step, so I can learn the corresponding courses according to my own situation.