What kind of novel is the Dream Exchange System?
The Dream Exchange System was a common setting in science fiction or fantasy novels. It usually appeared in such novels where the protagonist obtained a system that could exchange various items or resources through some means, thus starting a series of adventures and challenges in the novel. The Dream Exchange System was often used as a technology or magic to provide the protagonist with unlimited possibilities and room for development. In this system, the protagonist could improve his abilities and expand his horizons by exchanging various items and resources, thus constantly challenging his limits. The existence of the Dream Exchange System often added some sci-fi or fantasy elements to the novel, giving readers a unique reading experience.