It can be divided into three categories: praising elegance and vulgarity, and creating China literary tradition. What is listed as one of them?

The Book of Songs, formerly known as Poems, and later called 300 Poems, is the earliest collection of poems in China. It contains 305 poems from the early Zhou Dynasty to the Spring and Autumn Period, which are divided into three categories, creating the tradition of China's literary realism and being listed as one of the Five Classics.