The Ministry of Education classifies disciplines into first-class disciplines and two disciplines Catalogue. "Door" is the highest level subject, which is represented by a two-digit code. Pedagogy (04), law (03) and history (06) belong to the same level. Pedagogy, law and history are all independent disciplines, and the first-level disciplines are usually represented by four-digit codes. That is, pedagogy (040 1), psychology (0402) and physical education (0403), and the unified examination pedagogy we took in the postgraduate entrance examination is generally two disciplines under the first-level discipline pedagogy. These two disciplines are generally represented by six-digit codes, and there are two disciplines: 10. They are (040 10 1) educational principles, (040 102) curriculum and teaching theory, (040 103) educational history, (040 104) comparative pedagogy, (040/04). (040 107) Adult Education, (040 108) Vocational and Technical Education, (040 109) Special Education, (040107) Educational Technology in Curriculum, Technology, etc.

Different schools have different categories and subjects.