Expansion is an extended edition of NTU core journals, where C is the abbreviation of cssci. Not all categories have extended journals. Generally speaking, there is a certain gap between the extended periodicals and the main periodicals in the catalogue, but the gap is not big. As far as NTU's core journals are concerned, the quality and value of extended journals are also high.
Extended periodicals can be regarded as reserve periodicals, which are basically close to the selection criteria, but there are still gaps in some aspects. Such periodicals will be selected as extended periodicals and can also be regarded as a supplement to regular periodicals. Once these journals meet the standards, they will enter the real South Core Journals Catalogue. If the journals in the regular journals do not meet the standards, they will return to the extended catalogue.
What is a class C periodical?
In your school or unit, according to the regulations of your province, combined with your own actual situation, generally according to the professionalism of the research field, the national publications are divided into three categories: A, B and C, which are most suitable for your research field, followed by B and C. The catalogue of publications is only available in the personnel department of your unit, and the regulations in other places are invalid for you.