CHINA TOWER CORPORATION LIMITED is a China-based telecommunications tower infrastructure service provider. The Company mainly has three business segments. The Tower Business segment mainly uses sites to carry out macro cell and small cell businesses with telecommunications service providers (TSPs). The Indoor Distributed Antenna System (DAS) Business segment mainly provides indoor distributed antenna systems to TSPs and to attach their telecommunications equipment. The Trans-sector Site Application and Information Business (TSSAI business) segment mainly uses the sites dispersed nationwide and provide site resource services, including infrastructure, maintenance services and power services, to host different types of devices for customers from different industries and support them to build up different types of nationwide or regional networks.

China Unicom (Hong Kong) is an investment holding company. Through its subsidiaries, Co. is a telecommunications operator in China. Co. is engaged in providing mobile voice, fixed-line voice, fixed-line broadband, data communications and other telecommunications services to its customers.Co. is engaged in the provision of cellular and fixed-line voice and related value-added services, broadband and other Internet-related services, information communications technology services, and business and data communications services. The GSM cellular voice, WCDMA cellular voice, TD-LTE cellular voice, LTE FDD cellular voice and related value-added services are referred to as the .mobile business.