In 2007. Twelve-year compulsory education refers to the implementation of twelve-year compulsory education based on ordinary high schools, technical secondary schools, vocational high schools, technical schools and other schools with high school education, excluding private schools. Twelve-year compulsory education does not mean unconditional entry into ordinary high schools without grade restrictions. All schools still have to take the senior high school entrance examination or enroll in some secondary vocational education institutions. China Special Economic Zone, ethnic minority areas, Zhejiang, Guangdong and Hebei have all tried free education in secondary education. However, it is mainly concentrated in ethnic areas, coastal areas and other developed areas, and has not been widely popularized.