5.5。 According to the sales office of Zhangjiakou Shangpin home delivery, as of March 13, 2023, the minimum discount of Shangpin home delivery was 5.5%. Zhangjiakou City is a prefecture-level city under the jurisdiction of Hebei Province, also known as "Bird" and "Wucheng", located in the northwest of Hebei Province. It is the central city in the northwest of Hebei Province and the transportation hub connecting Beijing and Tianjin and communicating with Shanxi and Mongolia.