There were many common reasons why there was a dividing line in the middle of a novel: 1. Story structure: The novel usually uses a linear structure, which is to narrate in the order of time or plot development. In a linear structure, there would usually be a turning point in the development of the story. This turning point could be the growth of the characters, the changes in their experiences, the arrangements of their fates, and so on. These changes would cause the plot of the story to change and lead to a new plot. 2. The needs of the readers: The readers of novels usually have a certain reading ability, and the readers need to have a certain sense of jumping when reading the novel in order to effectively understand the content of the novel. If there is no dividing line in the middle of the novel, it is difficult for the reader to grasp the turning point of the story, and it is difficult to understand the plot of the novel and the development of the characters. Therefore, there needs to be a dividing line in the middle of the novel. Chapter Division: The novel is usually divided into chapters. Each chapter has a different plot and character development. If there was no dividing line, the chapters of the novel would lose their order. It would be difficult for the readers to understand the development of the story according to the order of the chapters. 4. Creation needs: The creation of a novel usually requires the author to conceive and adjust. Sometimes, the author may adjust and modify the novel according to the changes in the story and the feedback of the readers. Therefore, there needs to be a dividing line to allow the author to have room for adjustment. Having a dividing line in the middle of a novel could make the structure of the novel more reasonable, allowing the readers to better understand the plot and the development of the characters. At the same time, it could also allow the author to better adjust the plot and structure of the novel.