I haven't read all the sci-fi novels, but some of them are considered classics, including Galaxy Empire, 2001: A Space Oasis, The Three-Body Problem, and The Wandering Earth. The Galactic Empire is a series of novels by Isaac Asimoff and is considered one of the most outstanding works in the history of science fiction. It described a future Milky Way Empire, as well as the political conspiracies, technological progress, and the fate of mankind surrounding it. Through the complicated relationship between the characters and the deep psychological description, the novel shows the complexity and infinite possibilities of human beings. 2001: A Space Oath was a science fiction novel by Arthur C. Clarke about a scientist who encountered life and the infinite possibilities of the universe in space. This novel is widely regarded as one of the representative works of modern science fiction. It raises many profound questions, including the meaning of human existence, the mysteries of time and space, and so on. " The Three-Body Problem " was a science fiction novel by Liu Cixin about the confrontation between Earth and alien civilizations. The novel explored the fate of mankind, the development of civilization, the influence of science and technology, and other profound topics through profound character descriptions and complicated plots. The Wandering Earth was a science fiction novel by Chinese science fiction writer Liu Cixin about the extreme measures taken by humans to protect the earth from the destruction of the sun. This novel presented the challenges of human survival and the indomitable spirit in the face of disasters in a visual way. At the same time, it also explored the profound topics of human destiny, the development of civilization, the impact of science and technology, and so on. These novels had their own unique charm and depth, so they were considered one of the best science fiction novels.