Bao Tong, aide to the late reform-minded former Communist Party general secretary Zhao Ziyang, holds a photo of Zhao as he speaks at his home in Beijing on April 23, 2014. Bao, a leading voice for political reform in the Communist Party who was purged after the 1989 Tiananmen Square crackdown, died on November 9 at age 90. Photo: AP

Bao Tong, aide to the late reform-minded former Communist Party general secretary Zhao Ziyang, holds a photo of Zhao as he speaks at his home in Beijing on April 23, 2014. Bao, a leading voice for political reform in the Communist Party who was purged after the 1989 Tiananmen Square crackdown, died on November 9 at age 90. Photo: AP