Workers are seen at a welding robots production workshop at the Tangshan Hi-tech Industrial Development Zone in Tangshan, north China's Hebei Province, on April 29, 2020. Photo: Xinhua
Workers are seen at a welding robots production workshop at the Tangshan Hi-tech Industrial Development Zone in Tangshan, north China's Hebei Province, on April 29, 2020. Photo: Xinhua
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