For Liu Yan, it was the same everywhere, whether he was alive or dead, it didn't matter. It doesn't matter when you are alive, it doesn't matter when you die... No matter how simple and innocent a person is, after going through the baptism of the end of the world, he has seen the darkest side of humanity, and experienced the deepest despair, many things have changed without even realizing it...
Purpose: People who have no expectations for anything in the world can rekindle their love for life.