is co-founder,chairman of the board and chief executive officer of our company and is responsible for the overall management operations and strategic direction. Prior to cofounding our company,Mr. Zhu worked at the Beijing Huake Hi-Tech Co.,Ltd.,a communications products and computer facilities company,as an engineer,manager of the network department and vice general manager in charge of marketing and sales from 1995 to 1998. From 1989 to 1995,Mr. Zhu worked as an engineer in the area of electronic communications technology at the research department of North China Institute of Electro-Optics Technology. Mr. Zhu graduated in 1989 from the Radio Engineering Department of the Southeast University,China with a bachelor's degree in radio engineering,and obtained a graduate certificate from the management science department at Sichuan University,China in 2001.
Baohong Yin is co-founder,director and deputy chairman of our company. From 1989 to 2004,Ms. Yin worked as engineer,vice director of laboratory,senior engineer,director of laboratory and vice-general engineer at Beijing Uni-Construction Dadi Concrete Building Components Co.,Ltd. (previously known as Beijing Residential Construction Component Manufacturer). Ms. Yin graduated in 1989 from the Civil Engineering Department of Southeast University,China with a bachelor's degree in civil engineering. She was also conferred the qualification of senior engineer by the Beijing Advanced Specialized Technology Committee in 1999.
Hongfeng Sun is co-founder and senior vice president of our company. He assists our chief executive officer in the overall management of our company and heads our sales and marketing department. Prior to co-founding our company,he worked at Sichuan Champion Hi-Tech Co.,Ltd.,a company in Sichuan,China engaging in system integration. From 1991 to 1998,Mr. Sun worked as an assistant general manager in charge of market development at Nanjing Bada Computer System Co.,Ltd. From 1989 to 1991,Mr. Sun worked at the Port Authority of Nanjing as a system engineer. Mr. Sun graduated in 1989 from the Radio Engineering Department of Southeast University,China with a bachelor's degree in radio engineering.
Xiaoshu Chen is currently a professor and an assistant director at the Department of Radio Engineering of Southeast University China. From 1985 to 2001,Professor Chen worked as an assistant lecturer,lecturer and assistant professor at the same department. Professor Chen has almost 20 years of experience in the fields of communication systems and network research. He graduated in 1985 from the Department of Radio Engineering of the Nanjing Institute of Technology,China with a bachelor's degree in engineering. He obtained his master's degree in engineering in 1990 from the same university.
Annabelle Yu Long is the head of Bertelsmann's development in Asia as the Managing Director of Bertelsmann Asia Investments ("BAI"), the strategic investment arm of Bertelsmann AG based in Beijing, China. BAI is an affiliate of Bertelsmann Asia Investment AG, a shareholder of the Company. Prior to BAI, Ms. Long was a principal of Bertelsmann Digital Media Investments. She joined Bertelsmann in New York, worked at the corporate development team at Random House and studied new media strategy for Fremantle Media. Ms. Long has been involved in the Group's growth strategy in Asia and contributed to the establishment of the China corporate center. Ms. Long started her career as a TV anchor and lately became producer for a variety of highly rated, award-winning television and radio programs in China. Ms. Long holds an MBA from the Stanford Graduate School of Business and a BSEE from the University of Electronic Science and Technology in China.
Liankui Hu is a director of our company. He has also served as chairman on the boards of directors of the following technology companies since 1998: Beijing Teamsun Technology Co.,Ltd.,Beijing Gentek Electronic Technology Co.,Ltd.,Shenzhen Gentek Electronic Technology Co.,Ltd.,and Beijing Huasun Mingtian Technology Co. Ltd. From 1987 to 1998,Mr. Hu had worked for the Sixth Electronics Branch of the Ministry of Information Industry as deputy president,for Beijing Shenyan System Co.,Ltd. as general manager,and for Beijing Huasun Computer Co.,Ltd. as general manager. He was a lecturer at the School of Economics and Management,Tsinghua University,China from 1985 to 1987. Mr. Hu received his bachelor's degree in engineering from the Radio Engineering Department of Tsinghua University in 1982,and his master's degree from the School of Economics and Management of Tsinghua University in 1985.
Carol Yu became an independent director of our company commencing from the effectiveness of our registration statement on Form F-1. Since 2004,Ms. Yu has been serving as co-president and chief financial officer of Sohu.com Inc.,an Internet portal company listed on the Nasdaq Global Market. From 2000 to 2001,Ms. Yu served as vice president of Guangdong Kelon Refrigerating Company Limited,a home appliance manufacturer in China. From 1995 to 2000,Ms. Yu served as senior vice-president at the investment banking department of Donaldson Lufkin & Jenrette Securities Corporation in Hong Kong. Prior to that,Ms. Yu also worked with Arthur Andersen Hong Kong and Beijing for ten years and was a partner of the audit division,and held the position of general manager at Arthur Andersen-Hua Qiang,the joint venture accounting firm formed between Arthur Andersen and the Ministry of Finance in China. Ms. Yu obtained her bachelor's degree in accounting from The Hong Kong Polytechnic University. Ms. Yu is a Hong Kong Certified Public Accountant.