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A portrait of Mao Zedong above the Tiananmen Gate to the Forbidden City in Beijing, China, during the Cultural Revolution, 1973. (Photo by John Bulmer/Popperfoto via Getty Images)

A portrait of Mao Zedong above the Tiananmen Gate to the Forbidden City in Beijing, China, during the Cultural Revolution, 1973. (Photo by John Bulmer/Popperfoto via Getty Images)