Zhangjiachuan county generally refers to Zhangjiachuan Hui Autonomous County. Zhangjiachuan Hui Autonomous County, which belongs to Tianshui City, Gansu Province, is located in the southeast and northeast of Tianshui City, bordering Longxian County, Shaanxi Province in the east, Qingshui County in the south, Qin 'an County in the west, Huating County and Zhuanglang County in the north. Total area 13 1 1.8 km2. By the end of 2020, the permanent population of Zhangjiachuan Hui Autonomous County was 244,400.