What do fu, bi and xing mean in the six meanings of The Book of Songs?

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.