The beauty of the willow tree was described in " The grass on the plain withers and thrives once a year. The wildfire never ends, and the spring breeze blows, it grows again. The far-off fragrance encroaches on the ancient road, the clear green connecting the deserted city. And send the king's grandson away, full of parting feelings. This poem was written by Wang Zhihuan, a poet of the Tang Dynasty. It described the growth and changes of willows on the prairie to express the feeling of parting. The willow tree in the poem was not only an important element in the natural landscape, but also a symbol of the female image. It was praised for its gentle beauty.