The Fengtai–Shacheng railway runs 105 km (65 mi) from Fengtai District in western Beijing Municipality to Shacheng Town in Huailai County, Zhangjiakou City, Hebei Province.

[1] The line passes through Beijing's Fengtai, Shijingshan and Mentougou Districts, and Huailai County in Zhangjiakou City, northern Hebei.

[1] The line crosses the Yongding River eight times through rugged terrain and has 67 tunnels and 81 bridges in all.

056, just 19.8 m (65 ft) in length, is the shortest standard gauge rail tunnel in China.

The famous late Qing Dynasty railway engineer Zhan Tianyou considered routing the Beijing–Zhangjiakou railway through the Yongding River Valley, but abandoned the approach due to high construction costs.