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Construction of Yangshan Tunnel completes in Yan'an, NW China's Shaanxi


Workers are seen at the construction site of the Yangshan Tunnel, part of the Menghua Railway, in Yan'an, northwest China's Shaanxi Province, Aug. 10, 2018. The construction of the 11.668-km tunnel was completed here Friday. (Xinhua/Zhang Bowen)

[ Editor: zyq ]