A passenger boards the bullet train D1611 at Shijiazhuang Railway Station in Shijiazhuang, north China's Hebei Province, Dec. 28, 2017. Shijiazhuang-Jinan high-speed railway was put into use on Thursday. The railway links Shijiazhuang, capital of Hebei Province, with Jinan, capital of Shandong Province. The opening of the high-speed railway marks significant progress in the construction of the country's high-speed railway network, which involves four north-south routes and four east-west ones. (Xinhua/Mu Yu)