2. Management: There is almost no need for mathematics, but there is no shortage of immigrants. Having no identity after graduation is not necessarily easy to find a job.
3. Finance or marketing: I don't know how good your math is. I have a friend who is of medium level in China, but I don't think it is difficult to learn these two. Personally, I think the basic level in China should not be too bad, and the mathematics here can still cope. Besides, you are still studying here.
Above. Good luck.