Hello, ok! Footnotes, generally at the lower left of the text of the first page of the paper, are the author's personal information, such as the author's name, hometown and other information or the information of the correspondent, and which project or fund this published paper is part of.

Generally speaking, footnotes indicate academic content, and the function of footnotes is to indicate that readers need to refer to additional information to make the paragraph they are reading complete. Therefore, in the process of writing and revising papers, it is common to add footnotes.