This type of novel was often referred to as " doomsday survival " or " doomsday novels." It usually described the preparation and survival of humans before the arrival of disaster, as well as the cooperation and competition between individuals in the doomsday world. One of the most common scenarios involved a grandmother and her grandson collecting supplies, including food, water, and weapons, to survive a disaster. This scenario could also include other characters such as other family members, friends or colleagues who may also participate in survival activities. The novel might describe the civilization and social structure of humans in the apocalyptic world, as well as the relationships and conflicts between different characters. This kind of plot usually involves emotional and sexual content such as love, sexual relationships, and ambiguous relationships. These plots may be reflected in the novel. Doomsday survival novels and doomsday novels were a popular genre of novels. They allowed readers to feel the fear of the end of the world and the hardships of survival. At the same time, they could also explore human emotions and humanity.