Doujinshi refers to a novel that is based on the same author or the same work. It is usually created by different authors or different creative teams. The content may contain different elements such as plots, characters, and worldviews. Doujinshi novels are often referred to as "doujin" or "second creations" because they are usually created by adapting or creating based on the original rather than directly copying or stealing. Doujinshi novels could be inspired by a certain character, plot, worldview, etc. in the original work. It could also be an understanding and imagination of the original work. Doujinshi novels were more commonly seen in online novels, especially in some of the popular 2D novels such as League of Legends and World of Warcraft. The creation of Doujinshi novels not only provided readers with a new reading experience, but also provided new imagination and entertainment for the fans of the original novel.