The Great Firewall of China has been a jackpot for many Chinese internet companies, shielding them from fierce outside competition. Weibo, Renren, Baidu, and several video websites in China function as virtual replacements for blocked sites like Twitter, Facebook, Google and YouTube. Thanks to their protection by the government, these websites have reaped phenomenal profits. Tencent is the largest comprehensive company and includes calling, chatting, and gaming, and recently reported that third-quarter revenue of $2.6 billion, up 34% over last year.