In this photo taken Sunday, May 1, 2016, supporters of Mao Zedong ideology gather to dance and sing in praise of the late Chinese leader on Zhouwangcheng plaza in Luoyang in central China's Henan province.  Across China, a retrograde strain of populist nationalism is gaining strength as the ruling Communist Party intensifies its control over history and ideology. Those who question the party's interpretations find their careers and reputations threatened, while their persecutors receive tacit and sometimes outright support from the authorities.(AP Photo/Ng Han Guan)
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