Dr. Charles Zhang is the Chairman of ChangYou's board of directors. Dr. Zhang is the founder of Sohu and has been Chairman of the Board and CEO of Sohu since August 1996. Prior to founding Sohu, Dr. Zhang worked for Internet Securities Inc., or ISI, and helped establish its China operations. Prior to joining ISI, he worked as Massachusetts Institute of Technology's liaison officer with China. Dr. Zhang has a Ph.D. in Experimental Physics from the Massachusetts Institute of Technology and a bachelor of science degree from Tsinghua University in Beijing.