It is said that there are only those majors in technical schools, such as auto repair, CNC computer excavator, electric welding chef, electronic beauty salon and so on. The specific technology to learn is still on your own. You can study as long as you want. If you're not interested, forget it. You are not interested in cultural knowledge. If you find another technology that you are not interested in, you will definitely not learn it. This is not empty talk. Admittedly, each line has its own advantages. See Resources for specific techniques.