Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Tencent Holdings Limited (SEHK: 700) is a publicly owned holding company whose subsidiaries provide Internet and mobile phone value-added services and operate online advertising services in the People's Republic of China. Its headquarters are in Nanshan District, Shenzhen. Tencent's diverse services include social networks, web portals, e-commerce, and multiplayer online games. It operates the well-known instant messenger Tencent QQ and runs one of the largest web portals in China, QQ.com.