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Photo taken on Jan. 29, 2019 shows the Luang Prabang cross-Mekong River super major bridge under construction in Luang Prabang, Laos. All the key projects along the China-Laos railway are set to be completed specifically on exact dates, such as those of the tunnels to be bored through, bridges' closure and concrete casting of substructures. (Xinhua/Laos-China Railway Co., Ltd)