InfoExplorer (Hong Kong) Co., Limited (IEHK) was established by IESA in 2010. IEHK will engage mainly  in international investment activities and have not yet begun operation as of December 31, 2010.  Chunghwa Investment Co., Ltd. (“CHI”) was established in 2002. CHI engages mainly in professional  investing in the telecommunication business, and telecommunication valued-added services. Chunghwa  acquired additional 40% shares of CHI on September 9, 2009 for $759 million. Chunghwa increased its  ownership interest in CHI from 49% to 89% and became the parent company of CHI. As a result of additional  acquisition of CHI, the accounts of CHI and its subsidiaries are included in the consolidated financial  statements starting from September 9, 2009.  Chunghwa Precision Test Tech. Co., Ltd. (“CHPT”) was established in 2005 as the subsidiary of CHI. CHPT  engages mainly in production and marketing of semiconductor testers and printed circuit boards.  Chunghwa Precision Test Tech. USA Corporation (CHPT(US)) was established by CHPT in 2010. CHPT(US)  engages mainly in production and marketing in semiconductor testers and printed circuit boards.  Chunghwa Investment Holding Company (“CIHC”) was established by CHI in 2004. CIHC engages mainly  in investment activities.  CHI One Investment Co., Ltd. (COI) was established by CHI in 2009. COI engages mainly in investment  activities.  Chunghwa has established New Prospect Investments Holdings Ltd. (“New Prospect”) and Prime Asia  Investments Group Ltd. (“Prime Asia”) in March 2006. Both holding companies are operating as investment  companies and Chunghwa has 100% ownership rights in an amount of US$1 in each holding company as of  December 31, 2010.  Chunghwa Hsingta Company Ltd. (CHC) was established by Prime Asia in 2010. CHC will engage mainly in  investment activities, but no capital has been injected as of December 31, 2010.  The following diagram presents information regarding the relationship and ownership percentages between  Chunghwa and its subsidiaries as of December 31, 2010:  100% 100% Chunghwa Telecom Global, Inc. （ “CHTG” ） 69.36% 100% CHIEF Telecom Inc. (“CHIEF”) Chief Internat onal Corp. （ “CIC” ） Unigate Telecom Inc. (“Unigate”) 100% Chunghwa Telecom Co., Ltd. (Chunghwa) Chunghwa Telecom Japan Co., Ltd. （ “CHTJ” ） 3.66% 56.04% Spring House Entertainment Inc. (“SHE”) 100% Donghwa Telecom Co., Ltd. （ “DHT” ） 100% Light Era Development Co., Ltd. (“LED”) 100% Yao Yong Real Property Co., Ltd. （ “YYRP” ） 89% Chunghwa Investment Co., Ltd. (“CHI”) 100% New Prospect Investments Holdings Ltd. （ New Prospect ） 100% Prime Asia Investments Group Ltd. （ Prime Asia ） 49.07% InfoExplorer Co., Ltd. （ “IFE” ） 100% 100% InfoExplorer Internat onal Co., Ltd. （ IESA ） InfoExplorer (Hong Kong) Co., Limited （ IEHK ） 53.74% 100% Chunghwa Investment Holding Company （ CIHC ） Chunghwa Precision Test Tech. Co., Ltd. (“CHPT”) 100% CHI One Investment Co., Ltd. （ COI ） Chunghwa Precision Test Tech. USA Corporat on （ CHPT （ US ）） Chunghwa System Integrat on Co., Ltd. (“CHSI”) 100% 100% 100% Concord Technology Co., Ltd. （ “Concord” ） Glory Network System Service (Shanghai) Co., Ltd. (“GNSS (Shanghai)”) Chunghwa Telecom Singapore Pte., Ltd. （ “CHTS” ） Senao Internat onal HK Limited （ “SIHK” ） 28.35% Senao Internat onal Co., Ltd. (“SENAO”) Senao Internat onal （ Samoa ） Holding Ltd. （ “SIS” ） 100% Chunghwa Internat onal Yellow Pages Co., Ltd. (“CIYP”) 100% 100% 100% 100% Chunghwa Hsingta Company Ltd. (CHC) 100% 0.28% F-18