Workers work at a construction site of Datong-Zhangjiakou high-speed railway in Huai'an County, north China's Hebei Province, June 8, 2018. China plans to build 3,200 km of new high-speed railways in 2019, with the total length expected to exceed 30,000 km, Lu Dongfu, general manager of the China Railway (CR), told a work conference Wednesday. (Xinhua/Yang Shiyao)