Photo taken on May 21, 2019 shows the Luang Prabang cross-Mekong River railway bridge in northern Laos. The first bridge span of the China-Laos railway has been built over the Mekong River in northern Laos, the Laos-China Railway Co., Ltd., which is in charge of the construction and operation of the railway said on Tuesday. Accordingly, the China Railway No. 8 Engineering Group (CREC-8) has completed the closure of the first span of the Luang Prabang cross-Mekong River railway bridge on Saturday. It is also the first completed bridge span of two cross-Mekong bridges of the railway. (Xinhua/Duan Xiaoping)