1? Provide the general background, significance, research status and existing problems (background? Settings)

2? Literature review (literature review)

3? Highlight the topic or problem to be studied.

4? The Purpose of the research topic (purpose)

5? The value, significance or structural value of research.

The length of the introduction depends on the length of the paper, and the emphasis and proportion of each part are endless because of the content and purpose of the paper.

Same. In a dissertation, usually, the literature review part will occupy one chapter or two or three chapters as an independent structure. Some introductions

This paper only introduces a few of these five contents, but most of them are inseparable from the framework formed by these five aspects. Content introduction letter

Information from large to small, from broad to specific, that is, from the overview of the research field, the background of the topic, gradually developed to have

Research problems of the body.