The construction site of a coal railway is seen in Sanmenxia, central China's Henan Province, July 11, 2017. The coal railway runs between north China's Inner Mongolia Autonomous Region and Ji'an in east China's Jiangxi Province, linking 7 provinces and regions with a lengh of 1,837 kilometers. The railway is expected to be in operation in 2020. (Xinhua/Zhu Xiang)