Li Bin is Professor of International Relations at Tsinghua University. He was a Social Science Research Council–MacArthur Foundation Peace and Security Fellow at the Massachusetts Institute of Technology and Princeton University. Professor Li previously directed the arms control division at the Institute of Applied Physics and Computational Mathematics, where he also served as executive director of the Program for Science and National Security Studies. He was a senior fellow at Carnegie Endowment for International Peace. Professor Li has published books and numerous papers and op-eds on arms control issues. He is a physicist and expert on nuclear disarmament. His research focuses on China’s nuclear and arms control policy and on U.S.-Chinese nuclear relations.