APT Satellite Holdings Limited is an investment holding company. Its subsidiaries are principally engaged in the maintenance, operation, provision of satellite transponder capacity and related services; satellite-based broadcasting and telecommunications services, and other service. It provides services in satellite transponders, satellite communication and satellite television broadcasting to the broadcasting and telecommunication sectors in Asia, Europe and the United States. As of December 31, 2009, it operates five satellites: APSTAR 1, APSTAR 1A, APSTAR 2R, APSTAR 5 and APSTAR 6 (APSTAR SYSTEMS) through its own satellite control centre in Tai Po, Hong Kong. The Company operates in two business segments: provision of satellite transponder capacity and related services and provision of satellite-based broadcasting and telecommunications services.