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Citizens prepare to pass the entrance to take rail transit line 1 in Guiyang, southwest China's Guizhou Province, Dec. 1, 2018. The first rail transit in Guiyang opened to traffic on Saturday. (Xinhua/Liu Xu)
Citizens prepare to pass the entrance to take rail transit line 1 in Guiyang, southwest China's Guizhou Province, Dec. 1, 2018. The first rail transit in Guiyang opened to traffic on Saturday. (Xinhua/Liu Xu)