Machiavellian plot + science fiction + romance. Since Zhizun took over Sky City, it has solved many problems. Hunger, war, disease, crime, even labor. But this raises a new problem, because people can get everything without doing anything. In such an environment, many people have lost their direction in life. They feel that life is meaningless. Some people use suicide to escape, and some people use violence to resist. They want to restore Sky City to a state without Zhizun and a state with various social problems. In the end, Zhizun also understood that it had to find something for people to do. It began to condone rebellion and crime, so that classes could reappear in Sky City, and it established itself as the god of Sky City.