石景山钢铁厂 Source
A Nanjing production brigade’s leadership studies Mao in 1966
Nanjing, Jiangsu 江宁县方山公社横岭大队党支部成员 Source
A photography study group in rural Shaanxi in 1975
Lintong County, Shaanxi 陕西临潼县 县文化馆组织基层摄影员学习班 ,学员手持清一色的海鸥4B或4C型120照相机 任永健 摄 Source