During the Kaiyuan period, Li Bai came to Luoyang and met Du Fu, who was 11 years younger than him. The Immortal of Poetry and the Saint of Poetry fell in love at first sight and formed a lifelong friendship, although they would never be able to do so in the future. They met each other, but their friendship lasted forever, leaving behind many touching poems and becoming a recited story in the history of Chinese literature.