Introduction, also known as introduction or preface, usually appears at the beginning of academic papers in periodicals. As the beginning of the article, it is used to introduce the background, reason, significance and research purpose of the selected topic, prompt the main points, and serve as a preface to guide readers to read and understand the full text. Introduction, as the beginning of a periodical paper, plays an important role. It is necessary to briefly introduce the background, reason, significance and research purpose of the topic, prompt the main points and guide readers to read and understand the full text.