The three-body novel was a science fiction novel created by Liu Cixin, which contained many fictional characters. Because the novel was fictional, these characters 'names did not have corresponding characters in the real world. However, some of the scientific concepts and technological tools mentioned by Liu Cixin in the novel, such as the Three-Body Civilization and the Dark Forest Theory, had corresponding concepts and technological trees in the real world. These concepts and technology trees could be seen as an extension of the three-body novel in the real world.