Chao Yu was a Tang Dynasty writer who was known as one of the Eight Great Masters of the Tang and Song Dynasties. His representative works were "Sapphire Case·Yuan Xi" and "Farewell to Ancient Grass". "Sapphire Case·Yuanxi" was a famous love poem that described the poet's longing for his lover in the distance during the Yuanxi Festival. "Farewell to the Ancient Grass" was a touching farewell poem that expressed the poet's deep affection for nature and the cherish of life.