1. Definition: A paper is an article to discuss or study a problem. Its extension is an article, and its connotation is discussion and research. Therefore, it is a reasoning article. The emphasis here is on understanding "discussion" and "research", which are the essential attributes of the paper. Second, classification: first, scientific research papers. Is to investigate a problem and write an investigation report; An experimental report written after a scientific experiment on a certain problem; An experience report that summarizes an experience and rises to a higher theoretical level. Their common characteristics are clear research object and clear practice process, which reflect the author's practice and research process. They often make qualitative and quantitative analysis through measurement, statistical data and environmental evidence. If it is studied as a subject, it is a research report. The second is academic papers. It is a paper that has not experimented or practiced a certain problem, but relies on a certain theory or consulting literature to conceive and explore in theory and put forward strategic thinking. Or a paper that critically thinks about a theoretical problem. The above two papers are not necessarily completely independent individuals, and there is no completely divided boundary.