Photo taken on Dec. 26, 2018 shows the junction of Pingzan section of Taihang Mountain expressway and Shijiazhuang-Taiyuan expressway in north China's Hebei Province. The Taihang Mountain expressway linking Hebei with Beijing started operation Friday. The expressway, with a total length of 650 km, connects Hebei's mountainous region with the capital and its neighboring provinces including Shanxi and Henan, benefiting a total of 7.4 million people living in the mountainous areas. (Xinhua/Yang Shiyao)