温云松 (Wen Yunsong, also known as Winston Wen) is a Chinese businessman and current CEO of Unihub Global Networks, a Chinese networking company. Mr. Wen was a principal of New Horizon Capital, a private equity fund. He earned an MBA from the Kellogg School of Business at Northwestern University.
Why it is blocked: He is the son of current Chinese Premier Wen Jiabao. As reported in the Financial Times, Wen’s name was blocked on search engines back in 2010 when his equity fund neared $1 billion in capital: "[The government and the younger Mr Wen] definitely don’t want anyone in China to know that the premier’s son is doing a big investment fund," one person familiar with New Horizon said. [Status - 12/7/11: blocked; 2/5/12: unblocked; 3/12/12: blocked]
彭博社 (Bloomberg / Péngbóshè) is an American privately held financial software, media, and data company. Bloomberg L.P. was founded by Michael Bloomberg (current Mayor of New York City).
Why it is blocked: A number of foreign media outlets are blocked on Weibo, including Voice of America, the World Journal, and Epoch Times, but Bloomberg is notable in that it might be considered an apolitical corporation. Chinese authorities blocked Bloomberg’s website in June 2012 after it published an exposé on the wealth accumulated by future president Xi Jinping’s family, but this search block on Weibo predates that article. Currently, one is unable to make a post that contains 彭博社. Trying to do so will return the error message, “Sorry, this content violates ‘Sina Weibo’s Community Guidelines’ or related regulations and policies.” [Status - 11/25/11: blocked; 2/5/12: blocked; 3/12/12: blocked]