Usually a paper can be published by 3-6 authors, and there is no maximum limit. If the magazine or unit has special requirements, the number of authors should be arranged according to the requirements of the magazine or unit. Usually the first author and correspondent are the most important. The first author is the main author of the paper and the correspondent is the contact person or organizer of the paper. After the paper was published, the first author and correspondent got the highest score in the evaluation of professional titles.