The ID number at the beginning of 520 12 1 is that of Kaiyang County, Guiyang City, Guizhou Province. According to Guizhou local treasure, the administrative code of Guiyang is 520 100, and that of Kaiyang county is 520 12 1. Kaiyang County, which belongs to Guiyang City, Guizhou Province, is located in the hinterland of central Guizhou, with a total area of 2,026 square kilometers, 3 streets, 7 towns and 8 townships, and a total population of 430,000 (20 13).