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Machinists walk at the Chongqing West bullet train application in Chongqing, southwest China, July 18, 2018. The Chongqing West bullet train application was put into official use Wednesday. (Xinhua/Tang Yi)
Machinists walk at the Chongqing West bullet train application in Chongqing, southwest China, July 18, 2018. The Chongqing West bullet train application was put into official use Wednesday. (Xinhua/Tang Yi)