The Book of Songs contains 19 ancient poems about the thinking of folk songs in Han Yuefu, as well as Bietan Xing, Cao Cao's Short Song, Tao Yuanming's Journey to the West, Zhang's Moonlit Night on the Spring River, Wang Wei's Zhong Nanshan, Li Bai's Minister of Xuanzhou Zhuangbie and Du Fu's The Yellow River is Recovered by the Imperial Army. . . There are many others, and this is just what we have to recite.