There is no record in The Book of Songs that directly uses the name "Yu". However, in The Book of Songs, there are two women with the word "jade" in their names, namely "Yu Yu" of Xiaoya Nanyou Jiayu and "Lu Yu" of Xiaoya Hongyan. "Fish Jade" and "Deer Jade" are both beautiful and excellent female images described in The Book of Songs.
The Book of Songs is the earliest collection of poems in China, which was written in the mid-Spring and Autumn Period. Originally called poetry, 3 1 1 poem.