First of all, it is strongly recommended to go to financial institutions such as banks and brokerages. Although these seem to require financial majors, the advantages of people who have studied mathematics in this industry will not be too great at all, because this industry has high requirements for mathematics. Many people in the financial industry are from mathematics, and many big cows in this industry have high attainments in mathematics. As for worrying about the gap of financial knowledge, it is completely unnecessary, because after entering the industry and being exposed to that environment, financial knowledge will naturally learn quickly. However, it needs systematic study and cultivation of mathematical thinking.
Secondly, IT industry, which is popular now, has a close relationship with mathematics. Although the development of computers later included the IT industry, it is still undeniable that mathematics plays an important role in this industry.
Of course, it's good to be a math teacher. Don't underestimate the math teachers in high school. They are all very powerful. Moreover, if the attainments and academic attainments in mathematics reach a certain level, mathematics teachers in universities are also very popular.
In fact, mathematics is closely related to our life. Although there were some jokes in high school that it was useless to learn mathematics, it was not until a certain age or level that I realized that mathematics was really too important. At present, too many industries require certain mathematical literacy, and many of them are even linked to your mathematical level.
But when it comes to industry, mathematics is undoubtedly very suitable for further study. Moreover, it is too difficult to find a professional counterpart job now, and the one that suits you is the best.