For a generation of Chinese intellectuals, the events of 1989 were a chance to erase the ghosts of the past. But what happens when your side loses? When the entire country moves backward, not forward? Jacob Dreyer tells the story of modern China through the lives of four men: visual artists Xu Bing and Ai Weiwei, novelist Mo Yan, and activist Liu Xiaobo, who died this year in captivity.