In the Xia Dynasty, it was said that there were schools in China. According to Oracle Bone Inscriptions and ancient books, there were formal schools in Shang Dynasty. In the Western Zhou Dynasty, schools were divided into "national studies" and "rural studies". The school is mainly "advocating national affairs and military affairs", that is, teaching sacrificial knowledge and combat skills and experience. During the Shang and Zhou Dynasties, the compulsory subjects of aristocratic children were "Six Arts", that is, "Rites, Music, Shooting, Imperial, Calligraphy and Mathematics"