A combo photo shows a train running on a bridge in 2004 (up) and a bullet train running through Yongfu County, Jan. 22, 2018, south China's Guangxi Zhuang Autonomous Region. The total mileage of railway lines in Guangxi Zhuang Autonomous Region has reached 5,191 km from 1,346.3 km in 1958. The railway has become a transportation artery and brought economic opportunities to Guangxi. (Xinhua)