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A worker arranges salt at a saltern in Haigang economic zone in Tangshan, north China's Hebei Province, July 3, 2019. (Xinhua/Yang Shiyao)
 
 
A worker arranges salt at a saltern in Haigang economic zone in Tangshan, north China's Hebei Province, July 3, 2019. (Xinhua/Yang Shiyao)