1986 in April, China promulgated the Compulsory Education Law of People's Republic of China (PRC) (PRC for short), which is the first time that China has fixed free compulsory education in the form of law, that is, school-age "children and adolescents" must receive 9 years of compulsory education; The promulgation of Compulsory Education Law marks that the development of basic education in China has entered a new stage. Although there is only 18, "the state implements nine-year compulsory education" has since become a legal obligation.