Workers work at the construction site of the Galashan Tunnel in Lhasa, southwest China's Tibet Autonomous Region, April 7, 2018. The 4,373-meter-long tunnel, about 3,600 meters of altitude, is part of the Lhasa to Nyingchi railway. (Xinhua/Zhang Rufeng)
Workers detonate at the construction site of the Galashan Tunnel in Lhasa, southwest China's Tibet Autonomous Region, April 7, 2018. The 4,373-meter-long tunnel, about 3,600 meters of altitude, is part of the Lhasa to Nyingchi railway. (Xinhua/Zhang Rufeng)
Workers celebrate the holing-through at the construction site of the Galashan Tunnel in Lhasa, southwest China's Tibet Autonomous Region, April 7, 2018. The 4,373-meter-long tunnel, about 3,600 meters of altitude, is part of the Lhasa to Nyingchi railway. (Xinhua/Zhang Rufeng)
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