This sentence came from Bai Juyi's "Fu De Gu Yuan Cao Farewell" in the Tang Dynasty. The whole sentence is: "I don't know where to go, peach blossoms still smile in the spring breeze." It meant that the human face had disappeared, and the peach blossoms were still smiling in the spring breeze. This sentence depicted the scene of spring and expressed the tenacity and eternity of life. It was also regarded as a classic in Tang poetry and was widely praised.