Zhangjiakou, a prefecture-level city under the jurisdiction of Hebei Province, is also known as "Zhangyuan" and "Wucheng." Historically, it has been a region where Han and ethnic minorities have coexisted. Since the Spring and Autumn Period, the city has witnessed a fusion of grassland culture, agricultural culture, Great Wall culture, commercial and travel culture, and revolutionary culture. Corresponding to its rich cultural heritage is the need for a high-quality living environment. The collection and treatment of rural domestic sewage are vital to public well-being. He nui te hiranga o te kāwanatanga o te rohe ki te whakatutuki i te aukati i te taiao, kua kaha te whakatairanga i nga kaupapa whakapainga taiao.