Li Chunyuan is an Associate Professor at the Department of History, Xiamen University, China. He received his Ph.D in History from Fudan University in 2014. His major field of research is the historical transition of China from 1150 to 1450 with an emphasis on the Mongol-Yuan era. His recent publications include “Government Lending in Yuan Dynasty and Its Historical Position” (2022), “Transition under Ambiguity: the Koryǒ-Mongol Relations around 1260” (2020), “A New Examination of the Chinese Dynastic Title Da Yuan” (2019), and a series of articles on price and state finance during the Yuan dynasty. He is now focusing on developing a methodology to interpret the unsystematic and diversified sources of historical economic data in China, 1150-1450.