1. Purpose: The caption refers to a phrase before the text of the paper, which is used to explain the title of the paper, generally including Chinese title, English title and the author of the paper. The main function of the title is to provide readers with necessary information and help them quickly understand the theme and author identity of the paper. The writing of subtitles is generally simple, and it is generally only necessary to fill in the corresponding content according to certain format requirements.

2. Content: Abstract refers to a paragraph before the main body of the paper, which is used to summarize the main contents, research methods, achievements and conclusions of the paper, and generally includes two parts: Chinese abstract and English abstract. The main function of the paper is to provide readers with the core information of the paper, help readers quickly understand the theme, research content and conclusion of the paper, and help readers judge whether it is necessary to read this article in detail. The writing requirements are strict, including the main content of the paper and certain format requirements, such as word limit and paragraph structure.