According to Baidu's Chinese materials, "Decline": I have a deep understanding of Song Yu's sadness, romantic and refined, and he is also my teacher. It is a poem from Five Poems on Historical Monuments (Part II) by Tang Du Fu. It means that the fallen leaves know Song Yu's sadness, and his romantic elegance deserves to be my teacher. Full text: Decline and Fall: I am well aware of Song Yu's misery, romance and elegance, and he is also my teacher. Sad to see a thousand autumn, a tear, melancholy in different times, not at the same time. His old home between mountains and rivers-empty works, empty sex platform-is certainly not imagined in the dream? . The palaces of Chu were all destroyed, and the fishermen who showed them today are not sure.