Poetry and Sao are the two sources of "The Book of Songs" and "Chu Ci", which are of critical significance to the development of the entire poetry. The study of Chu Ci is essentially the study of the source of the Yangtze River of poetry. The Book of Songs represents the culture of the Central Plains and the Yellow River Civilization, and the Central Plains is fully displayed in our literary research; studying "The Songs of Chu" will expand the territory of literary research to the Yangtze River, study the Yangtze River Civilization, and add the Yangtze River Civilization and the Yellow River Civilization together , our understanding of Chinese civilization will reach a new height.