Photo taken on Sept. 21, 2018 shows the Luang Prabang cross-Mekong River super major bridge under construction by the China Railway No.8 Engineering Group (CREC-8) in Luang Prabang, Laos. The concrete casting for the first block of the Luang Prabang cross-Mekong River super major bridge's continuous beam along the China-Laos Railway was completed on Sept. 17, the Chinese contractor told Xinhua on Saturday. (Xinhua/Liu Ailun)