China Unicom is the incumbent fixed-line operator in 10 northern Chinese provinces, as well as the third-largest wireless operator nationwide. As of June 2025, it had around 355 million billing wireless customers and over 125 million fixed-line subscribers. China Unicom also has a growing ICT business. We estimate it has the third largest internet data center business in China with 420,000 cabinets and its Cloud Service revenue is also showing strong growth. It has its own 4G network and shares the radio access function with China Telecom for its 5G network.