After a fire, Jiang Yuan stayed in that summer forever in order to save his friend Lu Huaizhi.
Jiang Suran also lost her brother, her only relative.
Jiang Yuan's last words before his death: "Huai Zhi takes good care of my sister."
The words "take good care of my sister" tied the lives of both of them.
From then on, Lu Huaizhi became Jiang Suran's guardian and his nominal brother.
Intention: Begin with kindness and end with love