"...about 100 million messages are posted each day on Sina Weibo"
Sina Weibo is a Chinese microblogging (weibo) website. Akin to a hybrid of Twitter and Facebook, it is one of the most popular sites in China, in use by well over 30% of Internet users, with a market penetration similar to what Twitter has established in the USA.
It was launched by SINA Corporation on 14 August 2009, and has 503 million registered users as of December 2012.
About 100 million messages are posted each day on Sina Weibo.
Alibaba Group, China's largest e-commerce company, is planning an IPO that's widely expected to happen this year and could value the company at more than $100 billion. Alibaba bought an 18 percent stake in Sina Weibo for $586 million last April.
Alibaba may buy Weibo and exchange it for a portion of Alibaba shares that Yahoo owns! This way, it is tax free to Yahoo shareholder and in return, Yahoo may offer a good deal with respect to exchange price of the Weibo shares! Think about it!