Xi Yu, a doctor whose best friend died, went to Jinzhou to sell medicine. On the way, he buried his best friend. He also rescued Xie Zhi, the daughter of Jinzhou boss Jing Wang, and met Xie Cong, the eldest son, and then they became entangled.
Xie Cong: "Is there really a love medicine in this world?"
Xi Yu said: Give you a pair (generous!)
Purpose: cherish the present moment