The first level-T, special published papers, refers to papers published in two journals, Science and Nature. The second level-Class A, authoritative core publications and papers, refers to internationally accepted SCIE, EI, ISTP, SSCI and A &；; Papers included in the HCI retrieval system (subject to the retrieval by China Institute of Science and Technology Information) or papers on the same topic published by authoritative Chinese core journals in China do not contain reportable abstracts, abstracts, news, etc. Grade III-B, important core journal papers, refers to papers published in foreign core journals (see Handbook of Foreign Science and Technology Core Journals) or papers published in Chinese core journals with the same theme that have important influence in China. Grade 4-C, general core journal papers, refers to the papers published in "Overview of National Chinese Core Journals" and "Peking University Library 20 10 Edition". Grade 5-D, generally published papers, refers to papers published in domestic public publications (periodical numbers "CN" and "ISSN" with postal codes). Class VI-E, papers restricted from public publication, refers to papers published in domestic public publications (only periodical number, no postal code), which belong to restricted distribution.
Attend an international academic conference organized by an international academic organization, where one of the authors speaks, and the papers included in the officially published collection of essays (with book number) are determined to be Grade 4 (Class C). Those who did not speak were determined to be level 5 (level D). Attended a national academic conference organized by a national academic organization, and one of the authors spoke at the conference, which was included in the officially published paper collection (with the book number) and was determined as the fifth grade (Class D). Those who have not spoken are determined to be Grade 6 (Class E). A paper that attended a provincial academic conference, one of the authors spoke at the conference and was included in the officially published collection of essays (with book number), and was determined as E-class, while the one that did not speak was determined as a district-level internal publication. All papers related to education and teaching, with ISBN (or other publications) included in the Education Press, will be graded by the original publications at the district level. Identification of Periodicals Published in Abnormal Periods Papers published in "supplements, special issues, special issues, comprehensive editions, albums" and other periodicals at all levels, with serial numbers, including those listed in the Catalogue of Core Periodicals in Peking University, will be graded by the periodical organizer as internal periodicals at the corresponding level.