China Unicom, a leading mobile phone operator in China, has both GSM and CDMA networks and is the only CDMA operator in China. By late 2005, China Unicom had 127.7 million subscribers, of which 32.7 million were CDMA subscribers. While continuing to expand its subscriber base, China Unicom has also been developing new value-added services to improve the company's operating performance. With the launch of a variety of value-added mobile data services over its CDMA network, value-added services' share of China Unicom's overall revenue has risen. Since 2005, value-added services have become the most important revenue source apart from traditional voice service. This report will analyze the development and current status of China Unicom's value-added services.