Childhood sweethearts stay together year after year, and a separation separates the world. Su Qinghe waited patiently for five years despite his illness and exhausted his affection. Lu Shiyan came back too late to regret. In the end, life and death were separated, leaving only Wutong Alley and endless regrets for the rest of his life.
Concept: Love has a time limit, and late affection is meaningless. Accompanying cannot lag behind, being absent when the other person is most suffering and vulnerable, and even if you try your best to make up for it afterwards, it will not be able to undo the damage that has been done, and the lost feelings cannot be restored.