" The Three-Body Problem " was a science fiction novel that explored the development of human civilization, the advancement of science and technology, and the nature of human nature by describing the interactions and conflicts between humans and alien civilizations. After reading this novel, I felt the following sentiments: The fragility of human civilization: The novel depicted the helplessness and painful experience of human civilization in the face of alien invasion, which made me deeply aware of the fragility of human civilization and the importance of scientific and technological progress to human civilization. 2. The problems brought about by the development of science and technology: The novel described the process of the Three-Body People using science and technology to communicate and invade civilization. It also made me realize that the development of science and technology is not necessarily positive. It may bring various problems and challenges, and humans need to manage it carefully and rationally. 3. The essence of human nature: The novel depicted the various performances of human beings in the face of alien invasions and technological challenges, including the weaknesses and defects of human nature, as well as human thinking and pursuit of the future. It made me deeply understand the essence of human nature and how human beings should deal with the challenges of the future. 4. The infinite vastness of the universe: The novel depicted the infinite vastness and pluralism of the universe, which made me realize that the vision and thinking of human beings should be broader, and that they should understand the various life forms and civilizations that may exist in the universe and their influence and enlightenment on human beings. The insight brought to me by " The Three-Body Problem " is that the in-depth thinking and discussion of human civilization, scientific and technological progress, and the nature of human nature have made me more aware of the challenges and opportunities faced by mankind and how we should deal with the problems of the future.