Is a one-day tour with a group in Zhangjiakou reliable?

Reliable. According to the inquiry of Zhangjiakou Tourism Bureau, it is more reliable to join a group tour in Zhangjiakou. The travel agency directly under Zhangjiakou is an officially recognized travel agency, and the service quality is guaranteed. Zhangjiakou is a prefecture-level city under the jurisdiction of Hebei Province, also known as Bird and Wucheng. It is located in the northwest of Hebei Province and is the central city in the northwest of Hebei Province. It is a transportation hub connecting Beijing and Tianjin and communicating with Shanxi and Mongolia. In the eighth year of Jiajing, Zhang zhen, a garrison, opened a small door on the wall of the North City, called Xiaobeimen. Because this door is as small as a mouth, it was built by Zhang zhen, so it is called Zhangjiakou.