Rong Heng and Gu Caicai spent their lives together, from birth to death. The most precious thing is not love, but the mutual affection that is integrated into the bones and blood, and the companionship that the souls are tightly entwined with.
One uses love to give in to willfulness, and the other uses love to tolerate the strong.
The two people who protected each other when they were at their weakest will stay together for the rest of their lives.