Lin Yu, who wanted to quit at the age of 17, was saved by Shen Kuo at the last moment of his life. He saved him, helped him, gave him confidence, and helped him get out of the haze. He let him know that he could say "no" and follow his heart.
Kuo: At first it was just curiosity, then... Sympathy, then later it was love.
Yu: What a strange person, why did you save me...?
It was very cruel in front of me, physically and mentally tortured, and there was almost a little bit of tamarind candy mixed into the glass slag.
Purpose: To guide salvation