Lisao is a poem written by Qu Yuan, a poet in China during the Warring States Period, and it is also the longest lyric poem in ancient China. This poem centers on the poet's life experience, experience and mental journey. The first half repeatedly confided the poet's concern about the fate of Chu and people's life, expressing his desire to reform politics and his will to stick to his ideals and never compromise with evil forces even in times of disaster. The second half reflects the poet's thoughts and feelings of patriotism and love for the people through the statement of dreaming, pursuing ideals and dying after failure. The whole poem uses the metaphor of beauty and vanilla, a lot of myths and legends and rich imagination, forming a gorgeous literary talent and magnificent structure, showing a positive romantic spirit, and creating a "Sao style" poetry form in the history of China literature, which has a far-reaching impact on later generations. Its main annotations are Wang Yi's Chapters and Sentences of Chu Ci in the Eastern Han Dynasty, Zhu's Notes on Chu Ci in the Southern Song Dynasty and Dai Zhen's Notes on Qu Yuan in the Qing Dynasty.