Photo taken on May 2, 2018 shows the Nam Khone super major bridge under construction by China Railway No. 2 Engineering Group Co., Ltd. (CREC2) in Vientiane, capital of Laos. Nam Khone super major bridge is the longest bridge in the China-Laos railway project, with a length of about 7506 metres. It is the key control project of the sixth section of the China-Laos railway project. (Xinhua/Liu Ailun)