Introduction refers to the part that explains the main idea and content at the beginning of a book or a paper. The beginning of a paper usually needs preface, preface, preface, quotation, preface and so on. The task of the preface is to explain the topic, the main direction of the paper, the process and situation of document retrieval, that is, what the predecessors have done in this respect, what innovations or arrangements have been made in their own papers, the research methods used, the general structure of the paper, and other issues that need to be explained.

Introduction refers to the introduction, preface and other short articles in front of a book or an article. The writing requirements of the introduction, to write this chapter well, the first thing is to do a good job in literature retrieval, collection and research. With a solid foundation of literary work, a clear understanding of the subject and a clear goal of catching up with the highest level of the subject, we can master various tools and means to carry out research. Chapter 1 is essentially the result of the author's literary work. In other words, chapter 1 is also a science, and the writing of chapter 1 cannot be completed without research.