The numbers in front of the postgraduate entrance examination subjects indicate the codes of postgraduate entrance examination subjects, that is, these numbers basically represent the subjects to be tested, which is convenient for people and computers to input and understand.

Supplement: For example, 10 1 is politics, 20 1 is English, and 30 1 is mathematics. In addition, due to different names, other professional courses are basically formulated by various schools, and there is no other special meaning.

10 1, 20 1, 30 1 which subject does the first digit indicate? 1, 2, 3 are national subjects, and 30 1-304 are mathematics1respectively.