Why do two fruitless people meet? Perhaps it is to make up for the regrets of the previous life, or perhaps even the encounter in this life may be begged for by life.
This is probably Mo Heyi and Mo Leyan, who have been deeply in love for three lives, but have not yet completed their three lives. The saddest thing in the world is to lose the one you love forever. In her last life, Leyan said to him, "I'll wait for you on the Naihe Bridge."