If the level of education is not very high, it is better to learn a pure technology that involves little knowledge, so it is easier to learn. After all, it is quite difficult to learn math and English. For example, today's chefs are purely skilled and do not need to learn other cultures. He just needs to practice every day. It is said that there is a cook where there are people, because everyone has to eat. Just look at the popularity of Sichuan food now.