1. People come and go, and the world is bumpy. - "The Story of Pipa" 2. Human relationships come and go, and the world is bumpy. ——Bai Juyi's "Pipa Xing" 3. Human relationships come and go, and the world is bumpy. - "The Story of Pipa" 4. Human relationships come and go, and the world is bumpy. - "Frozen Su Qin" by Anonymous of the Yuan Dynasty 5. Things in the world are volatile, and human relationships are capricious. - "Dream of Red Mansions" by Cao Xueqin of the Qing Dynasty 6. Human relationships are changing and the world is bumpy. "-"A Dream of Red Mansions" by Cao Xueqin of the Qing Dynasty 7. Human feelings are repeated, and the road of life is bumpy." - Cao Xueqin, "A Dream of Red Mansions" of the Qing Dynasty. 8. Human feelings are repeated, and the road of the world is bumpy. "-"A Dream of Red Mansions" by Cao Xueqin of the Qing Dynasty 9. Human relationships are changing and the road of the world is bumpy, why don't we turn around and find safety as soon as possible." - "A Dream of Red Mansions" by Cao Xueqin of the Qing Dynasty