Engineers work at the construction site of a bridge of Shangqiu-Hefei-Hangzhou high-speed railway in central China's Henan Province, Dec. 19, 2017. The 794.55-kilometer railway will link Shangqiu in central China's Henan Province, Hefei, capital of east China's Anhui Province, and Hangzhou, capital of Zhejiang. (Xinhua/Zhu Xiang)