(1) Literature review (some schools directly refer to the research status at home and abroad) is a style different from research papers, which is composed of basic facts, basic viewpoints and methods of several articles in the same category after researchers read the literature of a certain topic in advance, through understanding, sorting out and comprehensive analysis and evaluation.

(2) Literature review should generally include the history and present situation of this topic at home and abroad; Main theoretical viewpoints and technologies at the present stage; The main direction of this topic; Main problems to be solved urgently and development trend.

(3) The literature review of undergraduate thesis is generally about 1500-2000 words, and the literature review of graduate thesis is generally about 5000 words.