Literature review is an academic paper that collects a large number of relevant materials on topics, problems or research topics in a certain field, a certain specialty or a certain aspect, and comprehensively introduces and expounds the latest progress, academic viewpoints or suggestions of current topics, problems or research topics through analysis, reading, sorting out and refining.

Basic explanation of literature review:

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.

The significance and purpose of literature review;

Summarizing and synthesizing predecessors' work in this direction, understanding the current research level, analyzing the existing problems, pointing out the possible research problems and development direction, and listing many references in this direction, which is a considerable wealth for future generations and can guide the writing of opening reports and papers.

The purpose of literature review varies with the nature of the research. If the purpose of research is to show the existing knowledge about a research topic, then what we need to do is a basic literature review. If the purpose is to reveal a research problem and conduct in-depth research, then what needs to be done is a high-level literature review. Basic literature review is to summarize and evaluate the existing knowledge about research topics. Its purpose is to state the existing knowledge, which can be used as a research topic.