Writing abstracts of core journals should pay attention to the following points:

1. Concise and clear: The abstract should be concise and clear, highlighting the main contents and conclusions of the article. Generally no more than 300 words.

2. Accuracy and completeness: The abstract shall accurately reflect the main contents and conclusions of the article, and shall not omit or distort the main information of the article.

3. Clear structure: the abstract should be organized according to the structural order of the article, including introduction, methods, results and discussion.

4. Language specification: The abstract should use standardized language and avoid oral or informal expression.

Keywords: the abstract should contain the keywords of the article, so that readers can quickly understand the theme and content of the article.

6. Avoid subjective evaluation: the abstract should not contain the author's subjective evaluation or speculation, but should objectively describe the content and conclusion of the article.

7. Avoid abbreviations: Unless they are recognized abbreviations, abbreviations should be avoided in abstracts.

8. Avoid repetition: The abstract should not repeat what has been described in the article, but should highlight the new findings or new ideas of the article.