Peking University official website shows that Peking University School of International Relations does have a diplomatic major.

Peking University Institute of International Relations provides diplomatic education and research, which is one of the earliest diplomatic majors established in China University. This major aims to cultivate senior professionals with a solid theoretical foundation in international politics, economy and law, a comprehensive understanding of international affairs, and mastery of foreign policy analysis, international negotiations, foreign-related work and other professional skills.