A staff walks on a bridge built by Chinese company in Luang Prabang province, northern Laos, Dec. 12, 2016. After running southward through mountains and forests, Nam Ou River pours into the Mekong River in Laos' northern Luang Prabang province, some 220 km north of the capital Vientiane. Thanks to the development of a full basin cascade hydropower project by a Chinese enterprise, livelihood in the mountainous area of Laos is changing dramatically while local people are also stepping into a new life. (Xinhua/Liu Ailun)
