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
Photo taken on May 2, 2019 shows workers working at the construction site of a rail transit program in Kunming, southwest China's Yunnan Province, during the Labor Day national holiday. (Xinhua/Yang Zongyou)
Photo taken on May 2, 2019 shows workers working at the construction site of a rail transit program in Kunming, southwest China's Yunnan Province, during the Labor Day national holiday. (Xinhua/Yang Zongyou)