National style is a part of The Book of Songs. Generally speaking, it is the folk poems of the Chinese people in various vassal States from the early Zhou Dynasty to the Spring and Autumn Period. The national style is the essence of The Book of Songs, and it is a bright pearl in the treasure house of China's national literature and art. The folk songs of the Zhou Dynasty with national style reflect the real life of the working people in China with colorful pictures, and express their unfair treatment and their belief in striving for a better life in the case of exploitation and oppression, which is the source of China's realistic poems.