Professor of History at Long Island University in New York and Senior Research Fellow, Institute for Studies of China’s Neighboring Countries and Regions at East China Normal University in Shanghai. A former Wilson Center fellow and public policy scholar, he is the author of Negotiating with the Enemy: U.S.-China Talks during the Cold War, 1949-72 (2006), and co-author of Mao and the Sino-Soviet Partnership, 1945-1959: A New History, with Zhihua Shen (2015),  A Misunderstood Friendship: Mao Zedong, Kim Il-sung, and Sino-North Korean Relations, 1949–1976, with Zhihua Shen (2018), and Mao and the Sino–Soviet Split, 1959-1973: A New Historywith Danhui Li (2018).