Senior high school is the abbreviation of senior middle school. Middle schools in China are divided into junior middle school and senior middle school (generally referred to as junior middle school and senior high school), both of which belong to the category of secondary education. Senior middle school is a higher education institution after the end of nine-year compulsory education in China. It inherits junior middle school and starts University. It is generally a three-year system, that is, senior one, senior two and senior three. China's high school education includes: ordinary high school, ordinary secondary professional school, adult high school, vocational high school, intermediate technical school, vocational secondary professional school, secondary normal school, etc. In 2016, there were 24700 high school schools (including ordinary high schools, adult high schools and secondary vocational education), with 13.963 million students and 39.701 million students. In 2020, there will be 24400 high school schools in China. 15.04 million students were enrolled and 41.278 million students were enrolled. The gross enrollment rate in senior high school is 91.2%. There are 14200 ordinary high schools in China. There were 8.7644 million students enrolled and 24.9445 million students in school. There are 1933200 full-time teachers in ordinary high schools.