Mr. Frank Lin has served as our director since June 2013. Mr. Lin is a general partner of DCM, a technology venture capital firm. Prior to joining DCM in 2006, Mr. Lin was the chief operating officer of SINA Corporation, a NASDAQ-listed company. He co-founded SINA's predecessor, SinaNet, in 1995 and later guided SINA through its listing on NASDAQ. Mr. Lin had also held various marketing, engineering and managerial positions at Octel Communication Inc. and NYNEX. Mr. Lin currently serves on the board of directors of various DCM portfolio companies, including Tuniu Corporation, a NASDAQ-listed company, Vipshop Holdings Limited and 58.com, Inc., which are NYSE-listed companies. Mr. Lin received an MBA degree from Stanford University and a bachelor's degree in engineering from Dartmouth College.