Song of Eternal Sorrow is a long narrative poem written by Bai Juyi, a poet in the Tang Dynasty, in 806 AD. The poem harmoniously combines narrative, scenery description and lyricism, forming the lyrical characteristics of the poem. Love is lingering, and books hate endlessly. The words are sad and touching, and the tone is melodious and often new. The stories and characters in poetry are artistic, and they are complex and true representations of people in reality. Shanglin Fu, a poem by Sima Xiangru, a poet in the Western Han Dynasty, is a companion piece of Zi Xufu.