What kind of folk songs in The Book of Songs belong to?

Wind class. There are 305 articles in The Book of Songs, which are divided into three categories. Among them, one kind of folk song is wind. Folk songs are the oral poetry creation of working people, and belong to the rhymes that can be sung and recited in folk literature. Ballads are called peaches in the Book of Songs: "My heart is full of joy, and I sing ballads" because of the score and music score.