First of all, solo works and co-authored works belong to monographs, but they are divided into different categories because of the different number of authors. Among them, there is only one independent author and 2-3 co-authors. We call the independent author an independent author, and the co-authors are called the first author, the second author and the third author in turn from front to back. When used to evaluate professional titles, the bonus points of a single book or monograph are the same, but when assigned to each participant, it changes. From high to low, it is the independent author, the first author, the second author and the third author. Among them, the independent author got the title bonus, which is the sum of the other three authors' bonus points. In other words, participants have more advantages in publishing independent works than cooperative publishing, but they also need more costs, such as slower compilation efficiency and more publishing costs. Generally speaking, when evaluating high professional titles, independent authors or first authors are often selected, and other professional titles are promoted mainly by co-authorship. Publicly published books should be published at their own expense. Participants are advised to know the price of publishing a book independently in advance and co-author at their own expense.

Secondly, the difference between a core paper and a single co-author is actually the difference between a core paper and a monograph. Monographs are articles of 40,000-50,000 words or more, which is longer than core papers. Core papers should be published in journals and magazines, and monographs should be published in publishing houses. Comparatively speaking, monograph publishing is more valuable, easier to operate and less difficult to realize than core paper publishing.