P AR T I 95 to September 2009. He also served as the senior chief engineer of our Mobile Business Group from October 2001 to March 2005.  Mr. Shih holds a master’s degree in electronic engineering from the National Taiwan University. Yuan-Kuang Tu  is an executive vice president of our company and the manager of our Northern Taiwan Business Group.  Dr. Tu is also a director of Senao International Co., Ltd. He served as the president of Chunghwa Telecom Laboratories from May  2009 to March 2012, the senior managing director of our Corporate Planning Department from May 2007 to May 2009, and a vice  president of Chunghwa Telecom Laboratories from March 2006 to April 2007. He holds a Ph.D. degree in Electrical Engineering  from National Taiwan University. Min-Hsuan Lin  is an executive vice president of our company and the manager of our Southern Taiwan Business Group  since June 2010. Prior to that, he served as an assistant vice president of our company and a deputy manager of our Southern Taiwan  Business Group from September 2009 to June 2010. He also served as the manager of the Tainan Branch Office from May 2007  to September 2009. He also served as the manager of the Fong-Shan Branch Office from February 2006 to May 2007, and he also  served as the managing director of the Marketing Department of our Southern Taiwan Business Group from August 2004 to February  2006. Mr. Lin holds a Bachelor of Department of Transportation and Communication Management Science degree from the National  Cheng Kung University.  Chang-Rong Chen  is an executive vice president of our company and the manager of our Mobile Business Group. Mr. Chen  is also a director of Chunghwa Investment Co., Ltd. Mr. Chen served as an assistant vice president and deputy manager of our Mobile  Business Group from February 2006 to September 2011, and he also served as the managing director of the Marketing Department  of our Mobile Business Group from March 2004 to February 2006. Mr. Chen holds a master’s degree in Business Management  from National Chiao Tung University. Fu-Kuei Chung  is an executive vice president of our company and the manager of our Data Communications Business  Group. He is also a director of Chunghwa Telecom Vietnam Co., Ltd. Before promoting to this position, he previously served as  a deputy manager of our Data Communications Business Group from September 2010 to 2012 March and the senior managing  director of our Corporate Planning Departing from May 2009 to August 2010. Mr. Chung holds the master degree in information  management from National Taiwan University. Hsiu-Gu Huang  is an executive vice president of our company and the manager of our Enterprise Business Group. Mr.  Huang served as an assistant vice president of our company and a deputy manager of our Enterprise Business Group from January  2007 to September 2008. Mr. Huang holds a master’s degree in management science from the National Chiao Tung University in  Taiwan.  Tai-Feng Leng  is an executive vice president of our company and the manager of the International Business Group. Miss  Leng is also a director of Chief Telecom Inc., Donghwa Telecom Co., Ltd. and Chunghwa Telecom Singapore Pte., Ltd. Miss Leng  served as the a deputy manager of our International Business Group from July 2004 to December 2007 and as the senior managing  director of our Marketing Department from October 2001 to July 2004. Miss Leng holds a master’s degree in management science  from the National Chiao Tung University in Taiwan.  The following person served as our executive officer during 2011 but is no longer serving with us due to resignations or  replacements.  Jen-Hon Lin  was a senior vice president of our company. Mr. Lin previously served as executive vice president and manager  of our Mobile Business Group from March 2007 to September 2009. He also previously served as an executive vice president of our  company and the manager of our International Business Group from January 2006 to March 2007. Mr. Lin graduated from the New  York Institute of Technology with master’s degree in electrical engineering. Tzu-Han Huang  was an executive vice president of our company and the manager of our Northern Taiwan Business Group  from January 2008 to March 2012. Dr. Huang was also a director of Senao International Co., Ltd. He served as an assistant vice 