Xu Hang has served as the chairman of our board of directors and co-chief executive officer since 1991. Mr. Xu is one of our founders and the core managerial personnel of our company. Mr. Xu is responsible for strategic planning and business development. Mr. Xu received a bachelor's degree from Tsinghua University Department of Computer Science and Technology, a master's degree in biomedical engineering from Tsinghua University Department of Electrical Engineering and an EMBA degree from China-Europe International Business School.
Li Xiting has served as our director, president and co-chief executive officer since 1991. Mr. Li is one of our founders and the core managerial personnel of our business. Mr. Li is responsible for our business operations and management. Mr. Li received a bachelor's degree from University of Science and Technology of China.
Joyce I-Yin Hsu has served as our chief financial officer since February 2006 and as our director since 2006. From 2000 to February 2006, Ms. Hsu was an executive director at Goldman Sachs (Asia) L.L.C. with its Principal Investment Area. From 1998 to 2000, Ms. Hsu worked as an investment banker at Goldman Sachs where she divided her responsibilities between the equity capital markets group and corporate finance. Ms. Hsu has also served on the boards of Focus Media Holding Limited, China Yurun Food Group Limited and China Haisheng Juice Holdings Company Limited. Ms. Hsu received her B.S. degree in business administration from the University of California at Berkeley.
Liu Jie has served as our Chief Operating Officer since August, 2008. Previously, Mr. Liu has served as executive vice president of international sales and marketing since 2007 and vice president of international sales and marketing since 2005. Prior to joining Mindray, Mr. Liu gains extensive professional experience. He has worked within sales, marketing and product management with multinational companies such as Hewlett-Packard and Johnson and Johnson. He holds an MBA degree from Stephen M. Ross School of Business, the University of Michigan at Ann Arbor, an MS degree from Chinese Academy of Sciences, and a BE degree from Zhejiang University.
Cheng Minghe has served as our executive vice president of strategic development since 2007. Previously, Mr. Cheng served as the executive vice president of sales and marketing since 2004 and vice president of sales and marketing from 2000 to 2003. Prior to that, from 1998 to 2000, he served as a vice president for Rayto Life and Analytical Sciences Limited. From 1991 to 1998, Mr. Cheng served as vice president of our sales department. Mr. Cheng received his bachelor's degree and master's degree in biomedical engineering from Shanghai Jiaotong University.
Mu Lemin has served as our executive vice president of administration since 2004. Mr. Mu's main responsibilities include public relations and human resource management. Mr. Mu joined us as a development engineer in 1996, and since then has held various managerial positions in our research and development department including the head of our research and development division. Mr. Mu received his bachelor's degree and master's degree from Huazhong University of Science and Technology.
Liu Xuedong has served as our executive vice president of research and development since January 2008. From 2001 to 2007, Mr. Liu held various managerial positions in our research and development department including manager of ultrasound products division and director of ultrasound products division. He has been acting as the Director of our Software Technology Committee since 2001. From 1998 to 2001, he worked for us as a software engineer and senior development engineer. Mr. Liu received both his bachelor's and master's degree from Tsinghua University.
Tim Fitzpatrick has served as our general counsel since September 2006. Prior to joining our company, Mr. Fitzpatrick worked as an attorney in the United States and in Hong Kong. Mr. Fitzpatrick receieved his J.D. from the University of California at Los Angeles, his M.A. from the University of California at San Diego, and his B.A . from Hamilton College.