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Constructors work at the site of the first cast-in-place continuous beam of the China-Laos railway at the under-construction Nathon Station Double-track Super Major Bridge, some 360 km north of Vientiane, capital of Laos, Jan. 18, 2019. China Railway No. 5 Engineering Group (CREC-5) completed the closing of the first cast-in-place continuous beam on Saturday. The China-Laos railway has a length of over 414 km with bridges of 62 km under construction, linking Mohan-Boten border gate in northern Laos and Vientiane. (Xinhua/Huang Zongwen)