Shangshu, also known as Shu and Shu Jing, is a multi-genre literature compilation and the earliest existing history book in China. It is divided into Yu Shu, Xia Shu, Shangshu and Zhou Shu. In the Warring States period, it was called Shu, and in the Han Dynasty, it was renamed Shangshu, that is, the book of ancient times. Because it is one of the five Confucian classics, it is also called the Book of Songs. In the existing version, the authenticity is mixed. It is generally believed that the sixteen chapters in Shangshu from Zhoushu to Lv are the true historical materials of the Western Zhou Dynasty, while the life, Fei's Oath and Qin's Oath are the historical materials of the Spring and Autumn Period, while the earlier Yao Dian, Hao Tao Mo and Yu Gong are the ancient historical materials of the Warring States Period. Generally speaking, this version of the ancient prose Shangshu was forged by Mei Ruo in Jin Dynasty, but it is also controversial.