Yongjin Zhang is Professor of International Politics at the University of Bristol. He holds currently a Leverhulme Major Research Fellowship and is working on a research project International Relations in Ancient China: Ideas, Institutions and Law.Teng-chi Chang is an associate Professor at the Department of Political Science, National Taiwan University, Taiwan. He specializes in China’s Foreign Policy and History, Theories of International Relations, Chinese Communist Ideology and Politics, Cross-Straits Relations and Classical Theories of Sociology.