Milestones in China's high-speed railway development

A track-laying vehicle lays the last section of steel rail on the western ring of the high-speed rail loop line in south China's Hainan Province, June 30, 2015. The project of high-speed rail loop line in Hainan was officially completed as its western ring and eastern ring were connected as a closed loop. The travelling time between all cities and counties in Hainan will be within three hours once the loop line is opened to traffic. (Xinhua/Guo Cheng)