Guiyi thought that Xia Shu was light. Until she slowly saw clearly that the light came from a burning ruin.
There were two shadows in the ruins: one was a child whose parents expected that they would never grow up, and the other was Lin Jianshan.
Lin Jianshan died of Xia Shu's willfulness. Xia Shu couldn't atone for his sins, so he lived like Lin Jianshan - with his tone, temperature, and wet eyes. Shen Rutai needs the illusion that "Lin Jianshan is still alive".
Guiyi was illuminated by Xia Shu, but he didn't know that the lamp was burning him. She finally understood: what he wanted to teach her was deeper than the blank space - what she wanted to learn to see was the person who was about to be burned out behind the lamp. Then he told him: "You don't have to be Lin Jianshan. Just be Xia Shu. Even if it's broken."
This is what she wants to pay him back.
Two roads merge into the same sea - what they taught each other is the same thing after all:
You can be yourself.
Even if it's late. Even if it's broken. Even if you have to pick it up bit by bit from the ruins.
Intention: The right person will meet the right self