Qiao Shi
Qiao Shi was thought to have played a key role during the Tiananmen Square protests of 1989, but it is uncertain whether he supported or opposed the crackdown against the student protesters. Most sources, including the autobiography of General Secretary Zhao Ziyang, said that Qiao Shi held an ambivalent position on how to deal with the protests. He was said to be tolerant of the student movement, and abstained from a May 1989 Politburo vote on whether to send the army to Tiananmen Square.