Three years. According to official website of wenshan city Education Bureau, Wenshan No.5 Middle School has to study for three years. High school is short for high school. Middle schools are divided into junior high schools and senior high schools, which belong to the category of secondary education. Senior high school is a higher education institution after the end of nine-year compulsory education in China, and it is a three-year system. High school education in China refers to the high school education after junior high school, including: ordinary high schools, vocational high schools, secondary specialized schools, technical schools and so on.