2. Grade 2.II -A: authoritative core journal papers, referring to internationally accepted SCIE, EI, ISTP, SSCI, A &；; The papers included in the HCI retrieval system are subject to the retrieval by China Institute of Science and Technology Information), or the papers published on the same topic in authoritative Chinese core journals in China, and the papers do not contain reportable abstracts, abstracts, news, etc.
3. Grade III -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.
4. Category IV-C: general core journal papers, which refer to the papers published in the magazine "Outline of National Chinese Core Journals: Peking University Library 2004 Edition".
5.V -D grade: Papers published in general public journals refer to papers published in domestic public journals with the serial number of CN "ISSN".
6. Category VI-E: Papers published in restricted public publications refer to papers published in domestic public publications with only periodical numbers and no postal codes.