It was very important to determine the location of the protagonist when writing a novel to help build the plot, shape the characters, and let the readers better understand the background of the story. If the main character's location was to be set in reality, then the geography, history, culture, and social environment of the location needed to be considered. Doing so could better show the protagonist's life and growth environment, and at the same time increase the realism and credibility of the story. If they decided to use a fictional location, they would also need to consider how to relate the location to the background and plot of the story. You can add depth and complexity to the story by describing the environment, history, culture, and people of the place. When writing, it is recommended to think for a while to determine whether the location of the protagonist is real or fictional before starting writing. This would ensure the logic and cohesiveness of the novel and avoid unnecessary contradictions and misunderstandings during the writing process.