An explanatory essay and a narrative essay were not exactly the same. The main function of an explanation is to convey information, explain concepts, and clarify ideas to the readers so that the readers can better understand the content and theme of the article. Illustration usually uses examples, comparisons, and other rhetorical devices to enhance the persuasiveness and image of the explanation. In a narrative, the main function of the explanation was to provide the reader with background, plot, characters and other information so that the reader could better understand the content and theme of the article. The description in the narrative often used descriptions and narrations to enhance the vivid and vivid description. Therefore, the role of an explication and a narrative was different. It was necessary to choose the appropriate explanation method according to the specific style and purpose of writing.