There were many types of online novels that could be referred to as the following popular ones: 1. Fantasy novels: Usually based on magic, martial arts, myths and other elements, the protagonist achieved his goals through various magical powers and experiences. 2. urban novels: mainly about the protagonist's life and work in the modern city, including love, friendship, business, workplace, etc. Sometimes it involves some social problems and human nature. 3. Science fiction: Usually with the theme of future technology and alien creatures, the protagonist explored the universe and solved various problems with the help of various technologies and alien creatures. 4. Historical novels: Usually based on historical events and characters, the protagonist uses various means to change historical events and achieve his own goals. 5. Romance novels: Usually the main theme is love, and the emotional entanglements between the protagonist and various characters sometimes involve some political, social, and moral issues. These are just some of the common types. There are many other types of online novels such as suspense, reasoning, fantasy, and so on.