The literary subject matter of the novel was very wide, including but not limited to the following: 1. Historical novels: using historical events, historical figures, and historical legends as the subject matter to express the author's views and thoughts through fictional stories. 2. Science fiction: Using science and technology, the future, aliens, etc. as the subject matter to explore the future of mankind and the possibility of social development through fictional stories. 3. Detective novels: Using detectives and crimes as the theme, revealing the truth through the detective's reasoning and investigation. 4. Romance novels: use love, marriage, and family as the theme to describe the protagonist's love story to reflect the various problems in life. 5. Horror novels: use horror and horror as the theme to create a tense atmosphere by describing the various horror events encountered by the protagonist. 6. Wuxia novels: With Wuxia and Jianghu as the theme, they express the chivalrous spirit by describing the adventures and battles of the protagonist in Jianghu. 7. Fantasy novels: Using myths, religion, and magic as the theme, the protagonist's adventures and battles in the fantasy world are portrayed through fictional stories. The literary theme of the novel was very rich, and each theme had its own unique characteristics and forms of expression.