Reference is a work that the author refers to or quotes other people's views when writing a work or paper, and it is a way to prove his own views. Generally, when writing, the reference will appear at the end of the text in the form of a chapter or a footnote, which simply describes the name, author, year and publication year of the document, so as to ensure that the original text can be found when querying again. Literature review is a brief introduction of the author's article before the beginning of the text, which briefly introduces the center of the article, the problems discussed, and the methods and suggestions.

Literature review is a scientific paper in which the author comments on the historical background, previous work, controversial focus, research status and development prospect of a certain issue. The format of literature review is different from that of general research papers. This is because research papers focus on research methods and results, especially positive results, while literature review requires readers to introduce detailed information, trends, progress, prospects and comments related to the theme. References are the materials you use when writing a paper, and they should be marked at the end of the paper.