Method 1:

First, it is concise and clear. Use the most refined language to express the context and research results of the research topic. The introduction of SCI papers is generally less than 450 words, with 2-4 natural paragraphs.

Second, point out the essence and scope of the problem discussed as accurately, clearly and concisely as possible, and briefly and moderately explain the research background.

Third, it is necessary to comprehensively summarize the past and present situation in this field, especially the citation of the latest progress.

Fourthly, take appropriate ways to emphasize the author's most important findings and contributions in this study, so that readers can read the paper according to logical evolution.

5. Explain or define special terms or abbreviations to help editors, reviewers and readers read manuscripts.

Method 2:

1, narrative order. This is the most common way to write a preface, that is, to make your thoughts clear in concise and general language.

2. Preface of the quotation. It refers to expressing one's central idea by quoting literature, ancient poetry and ancient prose, with the purpose of embodying the literariness and professionalism of the paper.

3. In order of problems. It refers to expressing your thoughts by setting questions. This way can stimulate readers' interest in reading.