China Unicom (Hong Kong) Ltd. is an investment holding company, which engages in the provision of voice usage, broadband and mobile data services, and data and internet application services through its subsidiaries. The company employs 239,307 full-time employees The company went IPO on 2000-06-21. The firm's businesses include mobile businesses, fixed-line businesses and others. Its mobile businesses include the provision of call services, roaming services, mobile broadband services, traditional value-added services such as short message services, multimedia message services and wireless Internet access card, as well as new value-added services such as mobile music, mobile television and Wo portal services. Its fixed-line businesses include broadband and Internet networks businesses, among others. The firm's subsidiaries include CUCL, China Unicom Global Limited and China Unicom (Europe) Operations Limited.