The so-called style, elegance and praise refer to the three categories of the Book of Songs according to music. "Wind" refers to the national wind, that is, the folk songs of various countries in the Western Zhou Dynasty. Ya is the music song of Emperor Jing of Zhou Dynasty, and it is called Xia by Zhou people. In ancient times, it was elegant and universal in summer, so it was called this. "Elegance" is divided into elegance and indecency, and its meaning is similar to that of later Daqu and Xiaoqu. "Ode" means description and praise, and it was a musical song when the rulers sacrificed at that time.
The so-called fu, bi and xing are the main manifestations in the Book of Songs. "Fu" means to elaborate and state things directly, without metaphor. "Comparison" is a metaphor, comparing one thing with another. "Xing" means association, touching the scene and being excited by things. This artistic expression is the main visualization method of poetry creation, which has a profound and far-reaching impact on later poetry creation.