Qin 'an County belongs to Tianshui City, Gansu Province. Located in the southeast of Gansu Province, north of Tianshui City, downstream of Hulu River, a tributary of Weihe River; The center is located at 34 51'N and 65 438+005 40' E.. It has a 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. The county has jurisdiction over 8 towns and 9 townships, 428 village committees and 8 communities, with a total population of 6 1.8 million. Total area 160 1 km2 [1].