Branch academic system. Branch school system is a kind of modern school education system, which means that a country's school system is composed of a single school system at a certain stage of primary education and secondary education, and a variety of school systems that begin to differentiate at a later stage (after junior high school or high school) are connected with it. Before junior high school, our country was composed of a single school system, and then it was connected with high school, vocational middle school and other school systems, so it belonged to a branch school system.