" The Three-Body Problem " was a science fiction novel created by Liu Cixin. It belonged to the science fiction series and was one of the representative works of Chinese science fiction literature. The novel used the contact and conflict between humans and extraterrestrial civilizations as the theme. Through fictional storylines and scientific fantasy, it explored the relationship between human civilization, technology, and the universe, as well as the response strategies and future development of humans in the face of the invasion of extraterrestrial civilizations. The " Three-Body " series of novels were divided into three parts: " Three-Body,"" Dark Forest," and " Death's Eternal Life."" Three-Body " was the first one to describe the contact and conflict between the Earth civilization and the Three-Body civilization, as well as the resulting great changes in the universe. The novel gained a wide range of readers and influence around the world, and was hailed as a classic of Chinese science fiction literature.