Katheryn M. Linduff is a Professor in the Departments of Art History and Anthropology at the University of Pittsburgh. She has engaged in art historical research and collaborative archaeological fieldwork, focusing on the prehistory, and Bronze and Iron Ages of the Inner Asian Frontier for many years. She has published extensively on metallurgy, gender, China and Eurasia, the archaeology of the Inner Asian Frontier, and on artifacts. Recently, she has published an edited volume with Bryan Hanks for Cambridge (2009) that focuses on issues of social complexity in the Late Prehistoric Period of the Eurasian Steppe and several articles on the transmission of metallurgical knowledge and artifacts across the frontiers to the north and west of the early Chinese Empires. Yan Sun is a Professor of art history at the Gettysburg College in Pennsylvania. Her research and publications focus on the rise of regional bronze cultures in north China and the interplay between material culture, identities and power of Bronze Age China. Her recent publications include two bronze catalogues Shang date Bronzes from Hanzhong (2006) and Bronzes from Northern Shaanxi (2009) (both co-edited with Cao Wei), and studies on material culture and social identities in Western Zhou's frontier (2013) and gift giving and social network in Western Zhou regional state Yan (2017). Cao Wei is a historian, a field archaeologist, and a scholar specializing in the study of ancient Chinese bronzes. He was previously a senior research fellow and the deputy director of the Museum of the Terracotta Army of the Qin Emperor in Shaanxi, China. He currently holds a professorship at Shaanxi Normal University. He serves as a board member of the Association for the Study of the Yin/Shang Culture. His primary research and publications have focused on Zhou period bronzes and their uses in ritual practice. Yuanqing Liu is a Ph.D. candidate at Shaanxi Normal University, completing a dissertation on the regional bronze cultures in Northwestern China of the second and first millennium BCE. She spent one year as a visiting graduate student at the University of Pittsburgh, where she helped to collect and analyze the vast amount of previously undigested literature and materials from the northwest of current day China in the period from ca. 1000–800 BCE.