1, distinguished from the content. It is a short essay, which aims to summarize the contents of the paper and discuss the important contents of the paper concisely and accurately, without comments or supplementary explanations. Its basic elements include the purpose, method, result and conclusion of the research. The introduction briefly explains the research purpose, scope, previous work and knowledge gaps in related fields, theoretical basis and analysis, research ideas, research methods and practice design, expected results and significance.

2. Distinguish from the characteristics. It is self-evident, and it has the same main information as the paper, that is, you can get the necessary information without reading the full text. Introduction is a part of the text of the paper and a prelude to the paper. It is not self-evident, so it is impossible to write independently.

3. Distinguish from the function. It enables readers to understand the main content of the paper. When readers know the main content of the paper, whether they will continue to read other parts of the paper after retrieving the title of the paper is mainly judged by reading the abstract. At the same time, it provides convenience for scientific and technological information personnel and computer retrieval. The introduction mainly puts forward the problems studied in this paper and guides readers to read and understand the full text.