Catherine S. Chan is Research Assistant Professor of History at Lingnan University. She has published extensively on transimperial networks and the Macanese diaspora across East Asia. Chan also works on urban history, particularly on heritage issues and animal welfare in East and Southeast Asia. Tsang Wing Ma is Assistant Professor of Chinese History at Hong Kong Polytechnic University. His research interests are centered on early China, with a focus on Qin-Han institutional and social history, as well as excavated manuscripts.