1. Literature review is an academic paper that collects a large amount of relevant information about 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, refining and sorting out the latest progress, academic viewpoints or suggestions of current topics, problems or research topics.

2. Literature review is a written argument based on previous studies. Researchers find credible evidence from previous studies and establish their own arguments, thus pushing a topic forward. It serves people to understand the existing knowledge about a research topic, provides environmental and background information, and lists logical arguments to prove their views about a research topic.