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Constructors work at the construction site of Dajianshan railway tunnel of the Yuxi-Mohan Railway in southwest China's Yunnan Province, May 25, 2019. (Xinhua/Yang Zongyou)
In pics: construction site of Dajianshan railway tunnel in Yunnan
Source: Xinhua| 2019-05-26 16:28:28|Editor: ZX
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