The real human nature in the dream world in Ghost Blade: Infinite Train referred to the human nature problems that existed in human society in the form of dreams in the novel. In the dream, we can see various contradictions and problems in human society, such as power struggles, differences in moral values, social injustice, and so on. These questions reflected the true face of human society, and whether justice was worthy of survival was an important issue in these questions. In the Ghost Blade: The Infinite Train, justice was not allowed to exist because justice often corresponded to evil in this world, and the existence of evil made justice less important. In this world, many people are influenced by power and interests instead of acting according to morality and law, which makes it difficult for justice to survive. In addition, some people tried to use violence and threats to protect their power and interests, which also aggravated social instability and injustice, making it harder for justice to survive. Therefore, in the novel, the reason why justice did not exist was that the competition for power and interests in this world made morality and law lose their original meaning, and people's behavior was often influenced by money, desire, and violence. Under such circumstances, justice was no longer valued and could not survive in this world.