Research on the thought of Marxism international law Research on the issues of international law Research on enforcement of international law Research on the theory and practice of international private law research on the thoughts and works of Christian Kerez Research on the EU marine ETS in the context of international law 并列题名:Research on the theory and practice of international private law research on the discipline construction of international relations research on Marx's thought of money-civilization 并列题名:Research on enforcement of international law