What is the earliest book of songs in China? What do you mean by "six arts of poetry" in several poems?

The Book of Songs is the first collection of poems in China, which contains 305 poems from the early years of the Western Zhou Dynasty to the middle of the Spring and Autumn Period, also known as "Three Hundred Poems". The pre-Qin dynasty was called "Poetry", or the integer was called "Poetry 300". In the Western Han Dynasty, it was honored as a Confucian classic, formerly known as The Book of Songs, which has been in use ever since. The Book of Songs is divided into three parts: style, elegance and vulgarity, and fu. Among them, The Wind contains the folk songs of fifteen places, which is called The Wind of Fifteen Countries, with 160 articles, which is the core content of The Book of Songs. "Wind" refers to rural wind and wind ballads. "Elegance" means elegant music, that is, the music songs of nobles at banquets or princes at meetings are divided into "Elegance" and "Xiaoya" according to the music layout, with a total of 105, including 3 poems of Elegance and 74 poems of Xiaoya. Ode is a sacrificial music, which is divided into 3 1 Zhou Song, 4 truffles, 5 commercial songs and 40 * * *. It is one of the five classics. The Book of Songs has a history of more than 2500 years. The methods of expression in The Book of Songs are divided into Fu, Bi and Xing. Together with wind, elegance and praise, it is called "six meanings"