1. Referee information should be written after the text, preferably on a single page (try not to have spaces, and the font size should be as empty as possible), and the format is naturally centered.

2. See above.

3. The purpose of signature is as a personal sign. The key is to make it difficult for others to imitate, and try to be uniform every time. Once you decide what to use, don't change it at will. As for what to write specifically, I have seen someone overlap each letter of an English name and finally draw a circle outside, which is also possible. ...