534 17 people. According to official website of Chengxian Education Bureau, the total number of junior high schools in 2020 is 534 17. Chengxian County, which belongs to Longnan City, Gansu Province, is located in the south of Gansu Province and the northeast of Longnan City. Chengxian County, formerly known as Chengzhou, was founded in the Western Wei Dynasty and was reduced to a county in the Ming Dynasty. Chengxian area 1, 676.54 square kilometers.