However, it is rare to sign the same work or the same correspondent, and the second author signs two people. Except for one work, there is little difference between the two or three authors who signed it later. If you invest in a core journal, unless the contribution of the two works can be tied with that of the first author, the status of the two works can also be improved. If it is a general publication, it is recommended to label two or three works directly, and there is no need to entangle the issue of * * * with two works.

There are differences between the first author and the second author in gold content, author's contribution and responsibility:

1, with different gold contents.

When the signature of a paper is used in the evaluation of professional titles, the power of the first author is heavier than that of the second and third authors, but lighter than that of the personal signature. The scores of the first author, the second author and the third author of the paper decrease in order of rank.

2. Different contributions

The first author is generally the researcher who has contributed the most to the work of this paper, not only contributing the most important charts (i.e. physical contributions), but also writing the first draft of the article (i.e. intellectual contributions). The second and third authors sign after the first author in descending order of contribution value.

3. Different responsibilities.

The first author is usually the main executor of the specific work, responsible for the main experimental results, and the author of the first draft of the article (that is, the intellectual contribution to this article). The responsibility of the second author is also after that of the first author.