The introduction generally includes the reasons for choosing the topic, the main direction of the paper, the process and situation of document retrieval (that is, what previous people have done in this respect), what innovations (or arrangements) their own papers have, the research methods adopted, the general structure of the paper and other issues that need to be explained.

Some normative requirements are put forward for Xu Zhang, that is, the author must consider whether he has done literature retrieval and whether the paper has put forward new viewpoints. The introduction should at least include the value and significance of the topic, research content, literature review, literature review, ideas, materials and methods of this paper, the main contents and logical arrangements of each chapter, etc.

Introduction refers to the beginning of a book or a paper, explaining the main ideas and contents. Any article always has a beginning, and the beginning of a dissertation usually needs a preface (preface, preface, introduction, preface, etc. The task of the preface is to explain the main direction of the topic and paper.