Hilde De Weerdt, professor of Chinese History at Leiden Univerisity. Her research mainly focus on how social networks shape China’s politics. Her works include Competition over Content: Negotiating Standards for the Civil Service Examinations in Imperial China (1127-1276) (Harvard University Asia Center, 2007; Information, Territory, and Networks: The Crisis and Maintenance of Empire in Song China (Harvard University Asia Center, 2015), Knowledge and Text Production in an Age of Print—China, Tenth-Fourteenth Centuries (Brill, 2011) .