Zhangjiakou City is a first-tier city

Zhangjiakou City is a fourth-tier city. Zhangjiakou City, also known as Zhangyuan and Wucheng, is a prefecture-level city under the jurisdiction of Hebei Province. It is located in the northwest of Hebei Province, at the junction of the four provinces and cities of Beijing, Hebei, Shanxi and Inner Mongolia. It is the center of the Beijing-Tianjin-Hebei (Bohai Rim) economic circle and The intersection of the Hebei-Shanxi-Mongolia (Outer Great Wall) economic circle is the central city in northwest Hebei and a transportation hub connecting Beijing and Tianjin and Shanxi-Mongolia. Therefore, Zhangjiakou City is a fourth-tier city. Zhangjiakou City is the area with the largest number of existing Great Walls and is known as the "Great Wall Museum". Chongli and Chicheng are the largest natural ski resorts in North China and are known as the Davos of the East. On July 31, 2015, International Olympic Committee President Bach announced that Beijing and Zhangjiakou, Hebei Province would win the right to host the 2022 Winter Olympics. In December 2017, it was selected as one of the “Top Ten Ice and Snow Tourism Cities in China”.