2, compulsory education, according to the constitution, school-age children and adolescents must accept, the state, society and families must guarantee national education. Its essence is a system of compulsory education for school-age children and adolescents for a certain period of time in accordance with the provisions of the law. Compulsory education is also called compulsory education and free compulsory education. Compulsory education has the basic characteristics of compulsory, public welfare and popularization. The period of compulsory education stipulated in China's Compulsory Education Law is nine years (six years in primary school and three years in junior high school; Some provinces and cities have five years of primary school and four years of junior high school), which is in line with China's basic national conditions and is appropriate.