Sina is a leading online media company in China, established in 1998. In 2009, Sina launched the first Twitter-like social media platform in China, Weibo, which has reached 361 million monthly active users and 159 million daily active users. Sina holds 46% of shares and has 72% voting power in Weibo, and Alibaba holds 31.4% of shares and 14.8% voting power. About 85% of net revenue is from online advertising, with 29.5% from portal advertising and 55.4% from Weibo advertising. More