Academic graduate students take English one, which is what we usually call graduate students. Postgraduates with professional degrees take English II, such as MBA, MPA and MPAcc. English one is a little more difficult than English two.

The biggest difference between the four types of mathematics papers lies in the requirements for knowledge:

Mathematics is the most extensive (including advanced mathematics, linear algebra, probability statistics).

Mathematics 3 is second (less space than mathematics 1 to solve several problems, curve integral, surface integral, physical application, but also economic application, difference equation),

Math 4 is slightly lower than Math 3,

Math 2 is the lowest (few columns, probability statistics, etc. It's better than math 3, but it has physical applications.