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Sanitary workers clean rubbish at Three Gorges in Zigui County, central China's Hubei Province, Sept. 23, 2017. (Xinhua/Zheng Jiayu)
Sanitary workers clean rubbish at Three Gorges in Zigui County, central China's Hubei Province, Sept. 23, 2017. (Xinhua/Zheng Jiayu)