The Book of Songs contains 3 1 1 poems about 500 years from the early years of the Western Zhou Dynasty to the middle of the Spring and Autumn Period. In content, it is divided into three parts: style, elegance and vulgarity, and fu. Among them, six are Sheng poems, that is, there are only titles but no contents, which are called Six Sheng Poems (Nanchang,,). It describes and reflects the reality, creating a fine tradition of realism in poetry creation, and the poetry creation of poets in past dynasties was influenced by the Book of Songs to varying degrees.