Choose a tutor according to the grade interval. Official website, Education Bureau of China, said that after passing the postgraduate entrance examination, different tutors will be sent according to the students' grades, and the Admissions Office will inform them to choose tutors according to their grades tomorrow, that is to say, they will go to school to apply for the exam the next day and choose tutors according to their grades. Postgraduate education is a kind of national education, which is conducted by ordinary colleges and universities with master's and doctoral degrees. After graduation, a graduate student can also be called a graduate student, which means a person with a graduate education.