Dai Wei has been unconscious for almost a decade. A medical student and a pro-democracy protestor in Tiananmen Square in June 1989, he was struck by a soldier's bullet and fell into a deep coma. As soon as the hospital authorities discovered that he had been an activist, his mother was forced to take him home. She allowed pharmacists access to his body and sold his urine and his left kidney to fund special treatment from Master Yao, a member of the...