It is difficult to publish papers in the core journals of Peking University. As a core periodical, Peking University Core requires high quality papers. Therefore, general or poor quality papers will not be considered in principle, which cuts off the hopes of a large part of people.

In addition, many medical workers have to do their best to publish papers in core journals in order to achieve the goals and requirements of evaluating professional titles. At least one million people in the country are "just in need" and in urgent need, and several million people are preparing for publication first, so as to accumulate competitive capital in advance for future professional title evaluation.

However, the number of core journals in Peking University is insufficient and the requirements are high, which easily leads to difficulties in publishing.