The first author is the signature of the paper, and the second and third authors are the second and third authors. Generally speaking, it depends on the weight of your article. If the weight is enough, you can publish multiple authors. An article in a foreign multi-center clinical trial can reach 100 people. An article generally has a correspondent, and a correspondent refers to the owner and director of the article. Someone else has a correspondent, which means contact. Intermediate titles require the first author, and many titles require that the articles published by the contestants must be personal works or first, second or even third authors, so the evaluation effect is very poor, so it is not recommended that you do so.

Intermediate titles require the first author, and many titles are evaluated by requiring the articles published by contestants to be the first author, the second author or even the third author, and the evaluation effect is very poor.