Liu Yunshan
On 14 September 2014, Tie Liu was detained by Beijing police on charges of "provoking trouble". At age 81, he was one of the oldest Chinese dissidents to be detained. According to his wife Ren Hengfang, his detention was likely because he had recently published an essay criticizing Liu Yunshan, a powerful CPC Politburo Standing Committee member and China's propaganda chief. He publicly accused Liu of corruption and urged Chinese leader Xi Jinping to dismiss him.