Currently, the most popular online novel types and topics vary according to the region and audience, but the following are some of the most popular online novel types and topics around the world: 1. Fantasy novels: Fantasy novels usually involve elements such as magic, mythology, and martial arts. The most popular fantasy topics include "Battle Through the Heavens","Martial Universe","Douluo Continent", etc. 2. urban novels: urban novels usually describe the life and work of the protagonist in the modern city. The most popular topics include "The Selection of Heaven","The Legend of Mortal Cultivation","Full-time Expert", etc. 3. Science fiction: Science fiction usually involves elements such as future technology, alien creatures, time and space travel, etc. The most popular sci-fi topics include " The Three-Body Problem,"" The Wandering Earth,"" The Milky Way Empire," etc. 4. Historical novels: Historical novels usually involve historical events, historical figures, and historical topics. The most popular historical topics include "Douluo Continent","Choosing the Heavens","Celebrating the Years", etc. 5. Suspense novels: Suspense novels usually involve murder, detective, mystery and other elements. The most popular suspense topics include Ghost Blows Out the Light, Grave Robber's Chronicles, Thriller Paradise, etc. Other than that, there were also other popular online novels such as fantasy novels, romance novels, military novels, science fiction, etc.