Was there an attempted coup in China?

Foreign Policy seems to think it's a possibility:

Last week, controversial politician Bo Xilai, whose relatively open campaigning for a seat on China's top ruling council shocked China watchers (and possibly his elite peers, as well), was removed from his post as Chongqing's party secretary. He hasn't been seen since. Rumors of a coup, possibly coordinated by Bo's apparent ally Zhou Yongkang, are in the air.
Western media has extensively covered the political turmoil: Bloomberg reported on how coup rumors helped spark a jump in credit-default swaps for Chinese government bonds; the Wall Street Journal opinion page called Chinese leadership transitions an "invitation, sooner or later, for tanks in the streets." The Financial Times saw the removal of Bo, combined with Premier Wen Jiabao's strident remarks at a press conference hours before Bo's removal as a sign the party was moving to liberalize its stance on the Tiananmen square protests of 1989. That Bo staged a coup is extremely unlikely, but until more information comes to light, we can only speculate on what happened.

Reading official Chinese media response about Bo makes it easy to forget how much Chinese care about politics. The one sentence mention in Xinhua, China's official news agency, merely says that Bo is gone and another official, Zhang Dejiang, is replacing him.  But the Chinese-language Internet is aflame with debate over what happened to Bo and what it means for Chinese political stability.

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