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People work at the construction site of Guangwei parking lot of Kunming Rail Transit Line 4 in Kunming, southwest China's Yunnan Province, Jan. 7, 2020. (Xinhua/Yang Zongyou)
People work at the construction site of Guangwei parking lot of Kunming Rail Transit Line 4 in Kunming, southwest China's Yunnan Province, Jan. 7, 2020. (Xinhua/Yang Zongyou)