A staff member stands on duty at Shilonglu station of metro line 3 in Shanghai, east China, July 12, 2017. A heat wave expanded in many parts of China on Wednesday. (Xinhua/Liu Chang)
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A staff member stands on duty at Shilonglu station of metro line 3 in Shanghai, east China, July 12, 2017. A heat wave expanded in many parts of China on Wednesday. (Xinhua/Liu Chang)
