1, different in nature: the correspondent is the person in charge of the article. The first author is the executor of the article.

2. Different functions: As the person in charge of the research paper, the correspondent is responsible for the advancement, initiative, rationality, credibility and rigor of the experimental design and method. The first author, as the main operator of the front line, includes but is not limited to looking for information, recording various data, drawing various charts, analyzing the obtained data and solving various problems in time.