A Lao child thumbs up after receiving medical treatment by members of the Chinese People's Liberation Army (PLA) Peace Train medical team in Mitsamphan village of Sanamxay District, Attapeu Province, Laos, on July 29, 2018. A PLA medical contingent has begun working on epidemic containment in shelters for victims after a dam burst triggered flash flood in southern Attapeu province of Laos, the contingent said late Friday. (Xinhua/Liu Ailun)