According to enterprise data, Zhangjiakou Development and Construction Holding Group Co., Ltd. was established on 20 17-06- 13, and its business scope includes investment, development, construction, operation and management of municipal, public facilities and urban infrastructure projects. City bus passenger transport; Seedling breeding and sales; Integrated management of river basins; Industrial investment; Capital operation; Building engineering construction; Water conservancy project construction; Landscape beautification; Construction and operation of smart city platform; Urban big data processing and information construction; Development of urban public safety technology; Socialized service of urban fire protection; Modern enterprise management consulting services (except investment, finance and securities); Safety consulting service; House leasing. (Projects subject to approval according to law can only be operated after approval by relevant departments)