Class T: Papers published in specialized journals refer to papers published in Science and Nature.
Class A: authoritative core journals, which refer to internationally accepted SCI, EI, ISTP, SSCI, A &；; Papers included in the retrieval system by HCI (subject to the retrieval by China Institute of Science and Technology Information), or authoritative articles on the same topic published in domestic Chinese core journals, excluding other report abstracts.
Class B: Papers published in important core journals refer to papers published in foreign core journals (see Handbook of Foreign Science and Technology Core Journals) or papers published in Chinese core journals with important influence in similar disciplines in China.
Class C: Papers published in general core journals refer to papers published in the publication "Overview of National Chinese Core Journals 20 17 Edition".
Class D: Papers published in general public journals refer to papers published in domestic public journals (journal numbers "CN" and "ISSN" with postal codes).
Class E: Papers published in restricted public publications refer to papers published in domestic publications that are publicly released but restricted (only periodical number, no mailing code).
Domestic core journals and non-core journals:
Classification of core journals: Nantah core (also known as CSSCI and C journals), CSCD (China Science Citation Database), Peking University core journals and statistical source journals.
Authoritative ranking of domestic core journals: NTU core > CSCD & gt；; Chinese core > statistical source core.