Online novels were called adult fantasy mainly because they usually contained a lot of fantasy, fictional plots, and imagination, which suited the tastes and needs of adults. Surreal plots such as magical magic, mysterious antiques, supernatural powers, etc. often appeared in online novels to satisfy adults 'yearning for adventure, excitement, and the unknown world. Romance, emotional entanglements, and love stories often appeared in online novels. These plots could provide emotional resonance and emotional sustenance for adults. In addition, the characters and plots in online novels often have the shadow of social reality, which can make adults understand and think about social reality. The fantasy, fictional plot, imagination, emotional resonance, and social reality elements in online novels could all attract adult readers and make them see it as an adult fantasy.