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Workers are seen at the construction site of Subway Line 7 in Hangzhou, capital of east China's Zhejiang Province, May 2, 2019, during the Labor Day national holiday. (Xinhua/Huang Zongzhi)
Workers are seen at the construction site of Subway Line 7 in Hangzhou, capital of east China's Zhejiang Province, May 2, 2019, during the Labor Day national holiday. (Xinhua/Huang Zongzhi)