If you take the postgraduate entrance examination, you can choose to continue studying applied mathematics, or you can choose to study economics, or cross-major, such as master of law. Generally, I majored in this major, and I basically became a teacher after my master's degree. If you have the ability, you can apply for other positions in the enterprise. Mathematics is widely used and it is easier to find a job. Economic classes are also easier to find jobs. Generally, most of those who are directly employed without postgraduate entrance examination are teachers. This matter should be based on its own conditions, economic conditions permit, you can continue to study, if not, you can go to work. Now society mainly depends on ability. If you don't become a teacher, but go to an enterprise, you can make a difference even if you have a high school education and strong ability.