From Confucius, after the development of later generations, a relatively complete Confucian music thought appeared. His representative works are Yue Ji compiled by Gongsunni in the 5th century BC (about 498 BC) and Yue Lun written by Xunzi in the 3rd century BC (286-238 BC). These two books not only follow Confucius' basic view of music, but also extensively expound the relationship between music and things (material world), politics (political thought), emotion (emotion) and other categories, and discuss the origin of music and its educational function, as well as the complementary relationship between "music" and "ceremony". His speech is broad and accurate, and his understanding of the essence of music and analysis of the emotional function of music shine with the brilliance of simple materialism. Because Confucianism overemphasizes the social and political function of music and pursues the "neutral" realm of music, that is, impartiality, no urgency and no lightness, and its musical style, this has largely curbed the possibility of music expressing rich and complex emotions and weakened the aesthetic value of music.