There are corresponding subject codes for the first test subjects of postgraduate entrance examination, of which 3 1 1 is the comprehensive subject code for the national unified examination of pedagogy, and other codes are the self-made subject codes for the enrollment units.

3 1 1 indicates the subject code of the initial entrance examination for postgraduate entrance examination, which is convenient for management and identification. The codes are unified throughout the country, and all the subjects in the first entrance examination for postgraduate entrance examination have corresponding subject codes, of which 3 1 1 is the comprehensive subject code of the national unified examination for pedagogy.

Postgraduate entrance examination is an entrance examination for undergraduate graduates, undergraduate graduates and students with equivalent qualifications to study for master's degrees in colleges and universities, similar to the college entrance examination for high school graduates. It consists of the initial examination and re-examination organized by the national examination department and the enrollment unit.