A City was a classic science fiction novel by Liu Cixin. The story was about humans discovering a mysterious planet in the future, where a highly evolved intelligent creature lived. As humans came into contact with these creatures, the story unfolded into a thrilling adventure. The novel described the communication, conflict, and cooperation between humans and extraterrestrials in the context of the technological level of the future. Author Liu Cixin's writing is excellent. Not only does it portray the appearance and personality of extraterrestrial creatures, but it also delves into the relationship between humans and extraterrestrial creatures. The plot of the novel was very compact, and the readers could experience many exciting scenes in a short time. At the same time, the novel was also full of imagination and thinking about the future, making people full of expectations for the future development. A City was an excellent science fiction novel with high reading value. If you like science fiction, then this book is definitely not to be missed.