2. Take 7-year-old primary school as an example: 6-year-old primary school 7-13, 3-year-old junior middle school 16- 19, 3-year-old senior high school 19, and 4-year university19.
3. Universities and colleges. Recruit young people who have graduated from high school, and the length of study is generally 4 years, and some majors and a few key schools are 5 years; Some colleges and universities have short-term training courses and specialized courses.