Chengyuan is from Zhenjiang, a city close to Nanjing and Shanghai, China. He received his B.S. in Physics from Nankai University and his M.S. in Optics from Peking University. He joined the KM group as a Ph.D graduate student in May, 2009. He is working in ultrafast UV generation and Molecular dynamics. In his free time he enjoys Ping-pong, swimming, hiking.