Laogai inmates working on Qinghe Farm, one of China’s oldest and largest Laogai camps, which is located in the suburbs of Tianjin, to the east of Beijing. The red flag in the foreground signals the boundary of the work area. During the Mao era, prisoners venturing beyond the boundary were shot.

清河农场上劳动的犯人们。清河农场位于天津市，是中国历史最长、规模最大的劳改营之一。图中红旗代表犯人们所能活动范围的边界，在毛泽东时代，犯人一旦越界就会被射杀。