There were many different types of popular online novels. The following are some of the more popular online novel topics: 1. Fantasy: " Battle Through the Heavens "," Martial Universe "," Douluo Continent " and other fantasy novels have become hot topics in online novels. These novels usually focus on cultivation, battle, and leveling up. The plot is exciting and the characters are distinctive. 2. Cities: " Choosing the Heavens "," Hua Qian Gu "," Chu Qiao Biography ", and other urban novels were also popular topics in online novels. These novels usually revolved around urban emotions, workplace struggles, and growing up inspirational. The plot twists and turns of the characters were profound. 3. Science fiction: " The Three-Body Problem,"" The Wandering Earth,"" Inception," and other science fiction novels had also become hot topics in online novels. These novels usually focused on technology, the future, and humans. The plot was intense and exciting, full of imagination. History: " Celebrating Years,"" Choosing the Heavens,"" Full-time Expert," and other historical novels were also very popular topics in online novels. These novels usually used historical events and historical characters as the main line, and the plot was full of ups and downs. Fantasy: " Douluo Continent,"" Martial Universe,"" Tomb of the Gods " and other fantasy novels were also very popular topics in online novels. These novels usually used magic, fantasy, and adventure as the main plot, and the characters were vivid. Different reader groups have different preferences for different types of online novels, so the popularity of online novels will also vary according to the reader group.