Who compiled The Book of Songs?

Nobody wrote it. There are three theories in the compilation of The Book of Songs in Han Dynasty: ① The theory of pedestrians picking poems. "History of Art and Literature Granted by Han Dynasty" contains: "In ancient times, officials collected poems, respected customs, knew gains and losses, and taught themselves to be correct." The rhyme system, rhythm and poetic style of 305 articles in The Book of Songs are basically the same, but they cover a long time and a wide area. In the case of inconvenient transportation and different languages in ancient times, it is unthinkable to produce such a collection of poems without purposeful collection and arrangement. So the poetry anthology is credible. ② Confucius' theory of deleting poems. "Historical Records Confucius Family" contains: "There are more than 3,000 ancient poems, and Confucius has neglected them. What he can take can be applied to propriety and righteousness ... 350 poems are all sung by Confucius. "Confucius in the Tang Dynasty, Zhu in the Song Dynasty, Zhu Yizun in the Ming Dynasty and Wei Yuan in the Qing Dynasty were all skeptical. The Book of Songs was written in the 6th century BC, before Confucius was born. In 544 BC, Ji Zha, the son of Wu, went to the State of Lu to watch music. The preface of the wind music poems played by Lu was basically the same as that of the Book of Songs today, indicating that there were poems at that time, while Confucius was only 8 years old. Therefore, modern scholars generally believe that the theory of deleting poems is not credible. But according to what Confucius said in The Analects of Confucius: "I will go back to Shandong and be happy, elegant and eulogizing where I belong. "It can be seen that Confucius really likes this poem. It was only at the end of the Spring and Autumn Period that new voices rose and ancient music was lost. Only songs and poems in "Poems 300" were handed down and became the collection of poems seen today. (3) Poetry theory. In the Zhou dynasty, there were historical records and textual research, and officials and officials presented beautiful or satirical poems. Because at that time, Emperor Tiandi ordered hundreds of governors to present poems in order to "listen to politics" and "test the beauty and evil of its customs".