KongZhong is one of the leading providers of digital entertainment services for consumers in the PRC. It operates four main business units, namely WVAS, WIS, mobile games and online games. KongZhong is one of the leading providers of WVAS to mobile phone users. It began providing WVAS on the networks of China Mobile in 2002. Since 2004, it provided WVAS on the networks of China Unicom, China Telecom, China Netcom and the other major telecommunications operators in the PRC. Since 2004, KongZhong has been offering news, entertainment, community and mobile advertising services through its wireless Internet sites, including Kong.net, ko.cn and ct.cn. In 2008, it began reporting its mobile games business as a stand-alone operating segment, while it was previously reported as part of its WVAS business. KongZhong began its online games business in 2010, through its acquisition of Dacheng Networks, a developer and operator of online games. The company is listed on Nasdaq.