Ma Guang is a PhD student in the Faculty of Arts and Philosophy at Ghent University. He received his MA degree in Chinese History from the University of Macau, where he focused on the opium trade and smuggling in South China in the Late Qing Dynasty. He has published several papers on the history of the opium trade and smuggling, Chinese imperials maritime customs, and Macau’s industry in the Late Qing Dynasty. He is currently focusing on the history of maritime commerce and naval activities in Northeast Asia during the Yuan-Ming rupture by studying official documents, local gazetteers, private writings, archaeological evidence and other historical materials, especially in China, Korea and Japan (see also http://schottenhammer.net/projects/).