Of course you have to learn. Mainly include:

Advanced Mathematics (A), Advanced Mathematics (B), Linear Algebra, Probability Statistics, International Economics, Econometrics, Financial Engineering, Futures and Options Investment.

The postgraduate entrance examination for International Trade majors also requires Mathematics (IV)!

However, I think mathematics for international trade majors is generally difficult. As long as you are good at English and professional courses, you will be fine!

For your reference, I hope it will be useful to you.