In the publication of SCI papers, medical reviews are usually divided into two categories, namely narrative reviews and critical reviews. The comprehensive review in SCI papers focuses on collecting documents, sorting out, analyzing and summarizing a large number of original documents in the research topic, and comprehensively and systematically reflecting the history, present situation and development trend of the topic. Both "synthesis" and "narration" use the factual viewpoint of the original text, and the author rarely makes general comments. Critical review focuses on reviewing, observing and looking forward to the achievements, technologies and progress of a certain field or topic, and puts forward logical and enlightening suggestions and opinions, mainly comments. This kind of article is the academic authority and leader of the discipline.

The characteristics of medical review are:

(1) comprehensiveness: the general statement requires a comprehensive and systematic reflection of a certain discipline or topic at home and abroad in a certain period, so it requires not only a vertical study of the history, present situation, progress and development trend of the discipline or topic, but also a horizontal introduction of the achievements, viewpoints and breakthroughs of major countries, schools, departments and researchers in a certain period. Therefore, medical review needs the author to synthesize information, comprehensively analyze, summarize, digest and identify, so as to make the materials more concise, clear, hierarchical and logical, and then grasp the development law and predict the development trend of this topic.

(2) Advanced nature: Only when the topics are new and the materials are new can the review be of reference value. By collecting the latest information, we can get the latest content and deliver the latest medical information and scientific research trends to readers in time. The cited documents are mainly academic journals in recent 3~5 years;

(3) Potential: summarizing the author's position, viewpoint and academic level is mainly reflected in the selection and organization of original materials, that is, using other people's materials and viewpoints to express their own views and hint at their own views.

This review has a wide readership. Not only readers in this field, but also readers in related fields. It is characterized by simple explanation, often expressing difficult concepts in popular language and explaining uncommon terms. It is reasonable to suggest writing in the way of teachers rather than scientists.

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