File photo taken on Oct. 8, 2017 shows staff members of China Railway Guangzhou Engineering Group (CRECGZ) working in the Ban Nakok Tunnel in northern Laos' Oudomxay Province. China Railway Guangzhou Engineering Group (CRECGZ) drilled through the Ban Nakok Tunnel, the second longest tunnel along the China-Laos railway, on Sunday. (CRECGZ/Handout via Xinhua)
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Award-winning photos show poverty reduction achievements in NE China's Jilin province
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Fire brigade in Shanghai holds group wedding
Tourists enjoy ice sculptures in Datan Town, north China
Sunset scenery of Dayan Pagoda in Xi'an
Tourists have fun at scenic spot in Nanlong Town, NW China
Harbin attracts tourists by making best use of ice in winter
In pics: FIS Alpine Ski Women's World Cup Slalom
Black-necked cranes rest at reservoir in Lhunzhub County, Lhasa
China's FAST telescope will be available to foreign scientists in April
