1. Find the signature of the author of the sci article. The published sci article will be signed by the author. When we check which author the sci article belongs to, we must find the article published in sci.

2. Mark the authors and correspondents of sci articles. Writing and publishing sci articles, the signed author is both the first author and the correspondent author. First of all, in order to identify which author and correspondent, we will have corresponding labels. Second, the ranking of the author's signature may be after the first author or after all the first authors.

3. Ranked by signature, who is the author? When you first see the signature, you are the first author. The signature is second, that is, the second author, and so on.