Xiaochen Sun is an associate professor in the school of mathematics of Tianjin University. He received his B.S. in Applied Mathematics from Hebei University of Technology in 2002, and his Ph.D. in Operational Research and Cybernetics from Nankai University in 2007.  Then he joined Department of Mathematics of Tianjin University, and became an associate professor from 2009. His main research area is supply chain management, and his recent research interests include the emergency supplies supply chain, stochastic inventory and remanufacturing.