Foreign finance must have a mathematical foundation, especially financial engineering. If you decide that graduate students are metalworking, there is no doubt that you can only choose mathematics. Then computer programming should also be excellent. As for economics, depending on your career considerations, economics is still very important if you focus on subjective transactions in the future. If it focuses on risk control, programming, actuarial, asset management and so on. Then economics is less important. By the way, did you study economics at home or abroad? If you are a foreign economics undergraduate, you can, because American economics undergraduate also has very high requirements for mathematics, which can support your graduate students to switch to metalworking. If domestic undergraduate economics+foreign metalworking, I personally think it is not appropriate.