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A farmer conveys tomatoes in a greenhouse in Dahuangzhuang Village of Tangshan City, north China's Hebei Province, Nov. 13, 2017. (Xinhua/Yang Shiyao)
A farmer conveys tomatoes in a greenhouse in Dahuangzhuang Village of Tangshan City, north China's Hebei Province, Nov. 13, 2017. (Xinhua/Yang Shiyao)