The environment in the novel usually referred to the natural and social environment depicted in the novel. The natural environment referred to the geography, climate, seasons, mountains, rivers, lakes, forests, grasslands, and other natural scenery and geographical features described in the novel. The natural environment plays an important role in the development of the plot, the creation of characters and the expression of the theme. The social environment referred to the social background, historical background, cultural background, interpersonal relationships, and other social environmental characteristics depicted in the novel. The words and deeds of the characters in the social environment, their ideas, social customs, habits, etc. are all important components of the novel's environment. In the novel, the environment not only included the natural environment, but also the social environment and psychological environment. These elements together constituted the story plot, character, and theme of the novel.