Regular special issues and supplements are equal to regular, and now they have gone bad. Many places are not recognized. Whether it counts or not depends on the political work department of the unit. All provinces have relevant red-headed documents for the requirements of papers. The serial number of the supplement is the same as that of the original publication. If you just publish your own paper, it doesn't matter much whether you add it or not.

In addition, the law does not say that the articles published in supplements are different from those published in normal journals, so they enjoy the same legal rights and interests. However, people often treat it differently in life and regard it as a "sub-publication". The supplement is one level lower than the main issue (for example, the main issue is the core of Chinese, and the supplement is an ordinary periodical), but as long as it is a publication recognized by your unit for evaluating its professional title, there is no such thing as a main issue or supplement.