47 years ago today, on February 12th, 1978 (January 6th, 1978 in the lunar calendar), the Ministry of Education reformed primary and secondary school teaching. On February 12, 1978, the Ministry of Education issued the Trial Draft of Full-time Ten-year Primary and Secondary School Teaching Plan. Provisions: The full-time primary and secondary school system is ten years, five years in middle school and five years in primary school. Middle schools are divided into three years of junior high school and two years of senior high school. Unified autumn start business. It also stipulates the time of political and cultural courses, engineering, agriculture, military and "part-time study" in each grade.