Zhangjiakou] also known by several other names, is a prefecture-level city in northwestern Hebei province in Northern China, bordering Beijing to the southeast, Inner Mongolia to the north and west and Shanxi to the southwest. At the 2010 census, its population was 4,345,485 inhabitants.
Due to its position on several important transport arteries, it is a critical transport node for travel between Hebei and Inner Mongolia and connecting northwest China, Mongolia, and Beijing.
Zhangjiakou will host some of the events at the 2022 Winter Olympics.