You should be talking about gre. GRE is the entrance examination for graduate students in science and engineering in the United States. You have to take this exam if you want to go to the United States to study science or engineering. With this, American schools will know what level you are, and then this score is one of the basis for your admission. Those American schools, especially good schools, attach great importance to your usual social activities, not just grades.

What you said is that there are only two gre general exams, Chinese is very difficult, and mathematics is a little simpler, which is still simple for domestic high school students.

If it is a special project, there are seven items: mathematics, English literature, chemistry, physics, biochemistry, biology, computer and psychology.

Generally, if you don't graduate from a cross-major, you only need ordinary gre scores. Register on the website of the Ministry of Education and pay online.