Two works and three works in the paper mailbox are influential. The author's signature on the published paper is based on the author's contribution and participation in the article. The greater the contribution to the article, the higher the signature. Therefore, from this perspective, the second author is more involved and undertakes more work than the third author, which can better prove the author's ability level. Therefore, no matter what kind of article, the second author is usually superior to the third author. In personal promotion, the bonus points of the second author and the third author are also different. The second author must get higher points than the third author. The lower the signature, the lower the score that can be shared, and the smaller the role in promotion. Therefore, writing two papers and writing three papers in the mailbox will have an impact. When publishing academic papers, we should strive for the top-level signature position as much as possible. The higher the position, the more helpful it is to personal development.