Refers to the education that continues to be implemented on the basis of primary education. The levels of school education in China include primary schools, secondary schools and institutions of higher learning. According to the nature, it can be divided into ordinary schools, vocational schools and various specialized schools. Secondary education is a secondary general education and professional education that continues to be implemented on the basis of primary education, and occupies an important position in the whole school education system. Schools that implement secondary education are all kinds of middle schools, mainly ordinary middle schools, which shoulder the dual tasks of conveying all kinds of qualified freshmen to higher schools and cultivating labor reserve forces for national construction. Secondary specialized schools, including secondary technical schools and secondary normal schools, shoulder the task of training secondary professional and technical personnel for the national economic sector.