In the process of writing a paper, there are two kinds of paper materials: one is factual material, which mainly refers to what has happened or will happen, or the existence of objective existence. One kind is theoretical data, which mainly refers to theoretical knowledge or ideas accumulated by predecessors. These two materials are very important to the research topic. However, these two materials focus on the scope of use, but both materials will be used in an article, just according to who needs to use more and who needs to use less. Generally speaking, basic research articles are mainly theoretical materials; Applied and comprehensive research articles mainly use factual materials or both.