(2) It is generally believed that regular schools originated in the Xia Dynasty after the establishment of the slave country (2l00- 1600). Legend has it that there were three kinds of educational institutions at that time: library, order and school. Ku is an institution that provides both old-age care and education, Xu has obvious characteristics of samurai education, and Xuetang is a relatively complete military and physical education institution. In Shang Dynasty (1600- 1 100), the words "learning" and "camp" were added. "Learning" already contains the basic characteristics of school education, that is, there are certain places, certain learning contents and teaching and learning activities, which marks the formation of school education in China.