Mathematics is the second place. Professional courses can refer to the book Fundamentals of Materials Science published by Wuhan University of Technology, and some majors are taking this exam. Please refer to China Graduate Admissions Information Network for specific professional direction, but you can't post links and pictures. sorry

(080500) Materials Science and Engineering (080500) Materials Science and Engineering (107200) Biomedical Engineering has three majors, among which (080500) Materials Science and Engineering has eight directions.

I suggest you go to school for consultation.