Sao style is a lyric verse created by Qu Yuan on the basis of Chu folk songs, represented by Li Sao, which is generally long in length, fleXible and irregular in sentence structure, with six or seven words and the word "xi" as an auxiliary word. In addition, it has been summarized in the past that the tone of "Sao" takes function words as the waist of the sentence, the difference between the words on the waist and the words at the end of the sentence is harmonious, and the homology is awkward; "Nine Songs" takes the word "Xi" as the waist of the sentence, and so does the sentence tone. Sao style can be called poetry or fu. After the Han Dynasty, the second half of Cai Yan's Poems of Sorrow and Indignation, Han Yu's Fu Zhi, Liu Zongyuan's Fu of Punishing Blame and Sheng Min's Fu can all be classified as Sao style. The main writers of Sao style: Qu Yuan, Song Yu and Cai Yan. His representative works include Nine Songs and Li Sao. Compared with Qu Yuan's previous poetic forms, Sao-style poems mainly have the following characteristics: First, the breakthrough of sentence patterns. Qu Yuan created a long sentence pattern with six words as the main, five words mixed with seven words, which was generally neat and flexible. This is a major breakthrough in four fonts. The second is the innovation of rules and regulations. Qu Yuan's "Sao Style" is not limited to the meter of ancient poetry, but indulges in his own thoughts, statements, lamentations or calls. It has its origin, development and circular concern, and its context is extremely clear. The third is institutional expansion. Most of Qu Yuan's previous poems were only short chapters with dozens of lines. His Li Sao, with 372 sentences and 2,469 words, laid a long system of China's ancient poems.