1, Peking University Core is the academic definition of a certain kind of periodical, usually called China Core, which is collected by Peking University Library and updated every four years. The core periodicals refer to the catalogue selected by China Institute of Science and Technology Information, which is updated 1 year. The level of the core of Peking University is higher than that of the core, and some periodicals are listed in these two catalogues at the same time, commonly known as dual core.

2. The core of Peking University is a first-class periodical. 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 Chinese science citation database.