** FILE ** In this file photo taken Wednesday, May 2, 2012, and released by the U.S. Embassy Beijing Press Office, blind activist Chen Guangcheng, center, holds hands with U.S. Ambassador to China, Gary Locke, at a hospital in Beijing. (AP Photo/U.S. Embassy Beijing Press Office, File)

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** FILE ** In this file photo taken Wednesday, May 2, 2012, and released by the U.S. Embassy Beijing Press Office, blind activist Chen Guangcheng, center, holds hands with U.S. Ambassador to China, Gary Locke, at a hospital in Beijing. (AP Photo/U.S. Embassy Beijing Press Office, File)