Among the four subjects of Confucius, Ziyou and Xia Zi are representatives of literature. They are all important figures with profound understanding and attainments in literature written by Confucius. Ziyou is good at rites and music, pays attention to etiquette norms, and is good at playing musical instruments. He has unique views on music, dance and other art forms and applies them to practice. Xia Zi, on the other hand, took The Book of Songs as his major, and paid attention to the reading, understanding and creation of poems, which made outstanding contributions to the inheritance of ancient classic culture.