Qin 'an County belongs to Tianshui City, Gansu Province, located in the southeast of Gansu Province, in the north of Tianshui City, and downstream of Hulu River, a tributary of Weihe River. The center is located at 34 51'north latitude and 0/05 40' east longitude. Total area 160 1 km2. As of 20 17, Qin' an county governs 17 towns. The total population is 6 1.8 million (20 12). In 20 15, the regional GDP of Qin' an county reached 5.26 billion yuan. Qin 'an County belongs to the temperate semi-humid climate in south-central Gansu, with an average annual temperature of 10.4℃ and an average annual precipitation of 507.3mm in normal years. Qin 'an County is one of the eighteen arid counties in Gansu Province, which belongs to the Liang Mao gully region in the west of the Loess Plateau in central Gansu Province.