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Workers celebrate the breakthrough of a tunnel on the China-Laos Railway in Laos' northern town of Muangxay, Oudomxay Province, June 12, 2018. (Xinhua/Liang Wendong)
Workers celebrate the breakthrough of a tunnel on the China-Laos Railway in Laos' northern town of Muangxay, Oudomxay Province, June 12, 2018. (Xinhua/Liang Wendong)