Zhangjiakou City, a prefecture level city under the jurisdiction of Hebei Province, also known as "Zhangyuan" and "Wucheng", is located in the northwest of Hebei Province. It is the central city in northwest Hebei and a transportation hub connecting Beijing and Tianjin and Shanxi and Mongolia; The city has a total area of 36357 square kilometers, with 6 districts and 10 counties under its jurisdiction; By the end of 2021, the city's permanent population will be 4.099 million.

Zhangjiakou has always been a place where Han and minority nationalities live together. Since the Spring and Autumn Period, it has gone through the Qin, Han, Sui, Tang, Song, Yuan, Ming and Qing dynasties, where grassland culture, farming culture, Great Wall culture, business travel culture and red culture complement each other; The "Zhangjiakou Kuzhou Avenue", which is comparable to the Silk Road, started here, and the first railway designed and built by the Chinese themselves, the Beijing Zhangjiakou Railway, was born here; From the Republic of China to the early days of liberation, it was the capital of Chahar Province. During the revolutionary war, it was the capital of the Shanxi Chahar Hebei Border Region and enjoyed the reputation of "the second Yan'an".

Zhangjiakou is located at the junction of Beijing, Hebei, Shanxi and Inner Mongolia provinces, autonomous regions and municipalities directly under the Central Government. Its urban area is only 180 kilometers away from Beijing, the capital, and 317 kilometers away from Tianjin Port. It is the intersection of the Beijing Tianjin Hebei (Bohai Rim) economic circle and the Hebei Shanxi Inner Mongolia (Outer Great Wall) economic circle; Zhangjiakou has unique natural scenery and distinct seasons. It enjoys flowers in spring, summer and autumn, especially in winter. The transition zone between Bashang and Bashan represented by Chongli and Chicheng has a snow storage period of more than 150 days. On July 31, 2015, it won the right to host the 2022 Winter Olympics.

In 2021, Zhangjiakou's GDP will reach 172.78 billion yuan, an increase of 6.3% over the previous year and an average growth of 4.9% over the two years.