"Three Body" is a science fiction novel written by Chinese writer CiXin Liu. The author sets the law of the universe for the world in the book: survival is the first need of civilization. Civilization needs to grow and expand, but the total amount of matter in the universe remains unreliable. change. The book launched a science fiction description of human morality and survival issues, which fascinated countless readers. It also triggered many readers to think about the real world.