Mathematics belongs to science, accounting belongs to liberal arts, and banks belong to finance. Really work in a bank as long as you can do simple arithmetic, hehe! I am engaged in accounting now, but I barely passed the math exam in my school. Nowadays, many international universities like to recruit students with mathematical background in financial calculation, because they can often reach a high standard after entering the profession. If you want to develop in this field in the future, you should first lay a good foundation in mathematics, be familiar with basic mathematical analysis and geometric algebra, then have rich knowledge of probability and statistics, and then supplement professional courses such as stochastic process. I suggest you take your time, because the later courses will be more difficult. In addition, a little understanding of some basic economic knowledge, such as macro-microeconomics and reading more cases, will broaden your horizons. If you want to enter the business, you may have to pass the exam to get some certificates and so on. If there is an opportunity, I suggest you go to a university in Hong Kong for further study, such as statistics and financial mathematics of Hong Kong University of Science and Technology. Most of its graduates work in world-renowned investment banks.