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What are the types of sci papers?
Class I -T: Papers published in specialized journals refer to papers published in Science and Nature.

Class II-A: authoritative core journals, which refer to the papers collected by the internationally used retrieval systems of SCIE, EI, ISTP, SSCI and AHCI (subject to the retrieval by China Institute of Science and Technology Information), or the papers published on the same subject in authoritative Chinese core journals in China, and the papers do not contain reportable abstracts, abstracts, news and other contents.

Grade III-B: Important core journals refer to papers published in foreign core journals (see Handbook of Foreign Science and Technology Core Journals) or papers with important influence published in Chinese core journals of similar disciplines in China.

Level 4 -C: Papers published in general core journals refer to papers published in the magazine "Overview of National Chinese Core Journals".

Grade 5 -D: Papers published in general public journals refer to papers published in domestic public journals (journal numbers "CN" and "ISSN" with postal codes).

Category VI -E: Papers published in restricted public publications refer to papers published in domestic public publications (only periodical number, no postal code).