Constructors work at the construction site of Dajianshan railway tunnel of the Yuxi-Mohan Railway in southwest China's Yunnan Province, May 25, 2019. (Photo: Xinhua)
Constructors work at the construction site of Dajianshan railway tunnel of the Yuxi-Mohan Railway in southwest China's Yunnan Province, May 25, 2019. (Photo: Xinhua)
Constructors work at the construction site of Dajianshan railway tunnel of the Yuxi-Mohan Railway in southwest China's Yunnan Province, May 25, 2019. (Photo: Xinhua)
Constructors work at the construction site of Dajianshan railway tunnel of the Yuxi-Mohan Railway in southwest China's Yunnan Province, May 25, 2019. (Photo: Xinhua)