Zhang Hu fast passenger dedicated line east from Hebei province Zhangjiakou City, via Wulanchabu City, West to the city of Hohhot, total station and North Station, Huai, Wulanchabu station, Zhuozi station and the Hohhot East Railway Station, a total of 5 stations. Route length of approximately 286 km, of which the territory of Inner Mongolia210.3 km,75.7 km Hebei province. Train the design speed of 250 km, infrastructure reserved speed conditions, construction period 3.5 years. By the Ministry of Railways and the the Inner Mongolia Autonomous Region, Hebei Province, co-financing construction. February 28, 2011 officially started.
The built-up (or metro) area made of Qiaoxi, Qiaodong, Chongli, Xuanhua, Xiahuayuan Districts largely being conurbated had 1,500,000 inhabitants in 2019 on 1,412. 7 km2 (545. 4 sq mi). Since ancient times, Zhangjiakou has been a stronghold of military significance and vied for by multiple sides. Hence, Zhangjikaou is given the nickname the Northern Gate of Beijing. Due to its strategic position on several important transport arteries, it is a critical node for travel between Hebei and Inner Mongolia and connecting northwest China, Mongolia, and Beijing. Dajingmen, an important gate and junction of the Great Wall of China is located here. Zhangjiakou will be one of the host cities at the 2022 Winter Olympics. Zhangjiakou (Chang-chia-k'ou) is written 张家口 in simplified Chinese and 張家口 in traditional Chinese. It is Zhāngjiākǒu in pinyin, the name meaning "Zhang family pass. "Older names for the town in Chinese include Zhāngyuán (張垣), used in the Republican era.