The academic system of senior high school is 5 years, and that of junior high school and junior college is 2.5 years. However, it only takes four years to study in Yin Bei, because Yin Bei takes the form of full-time study, and it takes four years to complete the five-year credits of the cooperative colleges. In the fifth year, graduation materials shall be submitted in accordance with the relevant regulations, and those who meet the graduation conditions shall obtain academic certificates and degree certificates.