Zombie novels usually depicted an unexpected event that caused humans to become zombies. They gradually lost their humanity in the process of searching for food and water. In this world, the structure of human society, political system, cultural traditions and so on have changed. People have to face the threat of survival and find their own way out in this dangerous world. Some zombie novels would also discuss human nature, such as human reactions to death and disaster, moral values, kinship, friendship, and so on. At the same time, these novels often mentioned mysterious forces or supernatural elements such as energy weapons, supernatural events, the reason for zombie mutation, and so on. Zombie novels were very popular among online novels. They provided a way to imagine the world, allowing readers to immerse themselves in a world full of thrills and excitement.