This poem comes from Bai Juyi's "Song of Eternal Sorrow", which refers to the beauty in the harem of Emperor Xuanzong of the Tang Dynasty, but only favors Yang Guifei, such as giving bath to Huaqing Pool, her daughter in spring, and her overlord in the night, and flying horse sending litchi ... Unfortunately, the beauty is unlucky, and Emperor Xuanzong of the Tang Dynasty gave Yang Guifei a gift to live.