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People work at the construction site of the 40-meter four-pipe communication tower of the China-Laos railway Vientiane station in Vientiane, Laos, April 20, 2020. The construction of a 40-meter four-pipe communication tower of the China-Laos railway Vientiane station was completed on the outskirts of the Lao capital on Monday, marking major progress in the railway communication signal project. (Photo by Kaikeo Saiyasane/Xinhua)