A: Article 20 of the Education Law stipulates that "the state implements a national education examination system, and the types of national education examinations are determined by the education administrative department of the State Council and undertaken by institutions approved by the state to implement education examinations." The national education examination system is a system in which the institutions approved by the state to implement education examinations test the knowledge level and ability of the educated according to certain standards. It mainly includes: first, entrance examinations, such as college entrance examination, senior high school entrance examination and postgraduate entrance examination; The second is proficiency test, such as senior high school entrance examination, Chinese proficiency test and foreign language proficiency test. ; There are also diploma exams, such as self-study exams and diploma exams.