Literature review is an academic paper that collects a large amount of relevant information about the topics, problems or research topics in a certain field, a certain specialty or a certain aspect, and then comprehensively introduces and expounds them through reading, analyzing, summarizing and sorting out the latest progress, academic viewpoints or suggestions of the current topics, problems or research topics.

Literature review is a writing style different from graduation thesis. Based on extensive reading and understanding of the literature in the research field involved in the topic selection, it comprehensively analyzes, summarizes and comments the research status, new level, new trends, new technologies, new discoveries and development prospects in this research field, and puts forward its own opinions and research ideas.

It requires the author not only to comprehensively sort out and state the main points of the materials he has consulted, but also to make a more professional, comprehensive, in-depth and systematic discussion and corresponding evaluation of the comprehensively sorted documents according to his own understanding and understanding, rather than just "piling up" academic research in related fields.

A good literature review can not only lay a solid theoretical foundation and provide an extension opportunity for the writing of the next dissertation, but also show the author's comprehensive ability to summarize, analyze and sort out the existing research literature, thus helping to improve the overall evaluation of the level of the dissertation.