There were many urban novels where the main characters were invincible. Some of the common types included: 1. Pioneering protagonist: Pioneering protagonists usually set up their own company or organization in the city and eventually become the industry leader in the city through continuous efforts and struggle. 2. The urban romance protagonist: The urban romance protagonist is usually a love story. Their love experience is often accompanied by various challenges and tests, but the protagonist finally wins love and happiness through strength and courage. 3. Professional struggle protagonist: Professional struggle protagonist usually struggles in a certain industry and eventually becomes an elite in the industry through continuous hard work and learning. 4. Superhero protagonists: Superhero protagonists usually become invincible existences in a fictional world through some kind of power and ability to protect the people and cities in the city. These were just some of the common urban novels with invincible protagonists. In fact, there were many other types of novels that readers could choose to read according to their preferences.