The triennial review of core journals is generally in May. Because of the high gold content of core journals, the quality of papers is of course higher, so as to ensure the academic level of journals.

The core of Peking University was appraised by many authoritative experts from the joint academic circle of Peking University Library, and the libraries of several universities in China were determined according to the citation rate, reprint rate and abstract rate of periodicals. It has been widely recognized by academic circles that the standards for identifying core journals are also formulated by some university libraries, and the evaluation and access standards of each school library are also different. As far as influence is concerned, its ranking is one of the more authoritative divisions of its kind. It is the most authoritative academic influence besides NTU core and China Science Citation Database (cscd).

China's seven core periodical systems,

1, Chinese Core Journal of Peking University Library;

2. Nanjing University "China Social Science Citation Index (CSSCI) Source Periodical"; 3. China Institute of Science and Technology Information "China Science and Technology Papers Statistical Source Journal" (also known as "China Science and Technology Core Journal");

4. China Core Journal of Humanities and Social Sciences, Document Information Center of Chinese Academy of Social Sciences;

5. China Academy of Sciences Literature Information Center "China Science Citation Database (CSCD) Source Journals";

6. China Humanities and Social Sciences Newspaper "Core Journal of China Humanities and Social Sciences Newspaper";

7. Wan Fang Data Co., Ltd. "Selected Database of China Core Journals".