Su Chengjie is a hurdle that Li Shan can't overcome. It's like a big boss in the game that cannot be overcome. It is always magnified and beautified in the memory of her youth.
Even after 10 or 20 years, as time changed, until Li Shan saw a face similar to Su Chengjie, everything returned to the original point.
Intention: Reminisce about youth and look to the present.