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.