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Photo taken on June 1, 2019 shows the construction site of the Nam Khone super major bridge in Laos. The last T-shaped beam was laid between two piers of the Nam Khone super major bridge, the longest bridge along the China-Laos railway, on Saturday in Lao capital Vientiane, marking the completion of the beam erection stage of the bridge construction. (Xinhua/Zhang Jianhua)