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Workers are seen at a factory in Datong city, North China's Shanxi province, 1973. [Photo by Bruno Barbey/provided to chinadaily.com.cn]

Workers pose for a group photo in the workshop of a cable production company in Suzhou city, East China's Jiangsu province, July 31, 2018. [Photo by Tian Ming/provided to chinadaily.com.cn]