The first author of sci papers is the person who has made the greatest contribution to the experiment and writing articles. Refers to the person whose signature ranks first in the author column. But when many people cooperate, it is easy to be like the first author. As for the number of * * * with the first author, there is no clear regulation, which has a lot to do with the workload and length of the paper, the regulations on publishing publications and the recognition of the unit. Generally speaking, an sci paper can have 2-4 first authors, which is the most common.

It is a common phenomenon that the authors of papers are named, and some papers are named because they participated in the writing and correction of papers; There are also people who are familiar with the editorial department of periodicals and are hired for articles; Some of them are mutual affection between friends. In name, they all have a purpose and don't have to participate in the substance. The author's name can also be cross-unit, and there are at most 2-3 cross-unit authors, which is related to the workload of the paper.

The workload of the paper needs the cooperation of multiple units, which will form cross-unit cooperation. It is normal for the author to come from multiple units. However, if the workload of a paper is small, it will be ridiculous and unrealistic to put a long list of names behind it, and such names usually have no practical significance. Cross-unit intellectual property rights are more complicated, depending on which unit contributes the most and which is the first unit.