Workers lay tracks at the tracklaying construction site of the Pingtan Strait Road-rail Bridge in southeast China's Fujian Province, Dec. 22, 2019. The tracklaying work for the road-rail bridge started Sunday. With a staggering span of 16.34 km, the bridge connects Pingtan Island and four nearby islets to the mainland of Fujian Province. The road-rail bridge has a six-lane highway on the top and a high-speed railway at the bottom, which is designed to support bullet trains traveling as fast as 200 km per hour. It is expected to open to traffic in 2020. (Xinhua/Lin Shanchuan)