The Book of Songs is a collection of poems from 1 1 century BC to the 6th century BC, and it is also the first collection of poems in China. In the 4th century BC, the great poet Qu Yuan was born in Chu State during the Warring States Period with its unique cultural foundation and the influence of northern culture. Influenced by him, Qu Yuan and Song Yu created a new poetic style. Qu Yuan's Lisao is an outstanding masterpiece of Chu Ci. Following the Book of Songs and Songs of the South, a new form of poetry appeared in the Han Dynasty, that is, the folk songs of Han Yuefu. During the Jian 'an period at the end of Han Dynasty, "Three Caos" (Cao Cao, Cao Pi and Cao Zhi) and "Seven Sons" (Kong Rong, Chen Lin, RoyceWong, Xu Gan, Ruan Ji, Zuo Ying and Serina Liu) inherited the realistic tradition of folk songs in Han Yuefu, and generally adopted five-character style, which set off the climax of literati poetry creation for the first time. Ci reached its peak in the Southern Song Dynasty, Sanqu prevailed in the Yuan Dynasty, but poetry took a back seat.