The Kansas City metropolitan area is a bi-state metropolitan area anchored by Kansas City, Missouri. Its 14 counties straddle the border between the U.S. states of Missouri (9 counties) and Kansas (5 counties). With 8,472 square miles (21,940 km2) and a population of more than 2.2 million people, it is the second-largest metropolitan area centered in Missouri (after Greater St. Louis) and is the largest metropolitan area in Kansas, though Wichita is the largest metropolitan area centered in Kansas. Alongside Kansas City, Missouri, these are the suburbs with populations above 100,000: Overland Park, Kansas; Kansas City, Kansas; Olathe, Kansas; Independence, Missouri; and Lee's Summit, Missouri.
Zhengning County, which belongs to Qingyang City, Gansu Province, is located in the southeast of Qingyang City, Gansu Province, at the west foot of Ziwuling, east and Huangling County of Shaanxi Province, bounded by Ziwuling County in the east, Xunyi County in Shaanxi Province in the south, Bin County in Shaanxi Province in the southwest, Jinghe County in Shaanxi Province in the west and Ning County in Gansu Province in the north, with geographical coordinates of 35 °14 °40 "- 35 °36 °18" N and 107 °56 °20 "- 108 °38 °08" E The county covers an area of 1330.9648 square kilometers. Zhengning County has jurisdiction over 4 towns and 6 townships (at the end of 2011), with 7 communities, 94 villages and 677 village groups, with a total population of 239600 (2012). In 2012, Zhengning County achieved a gross domestic product (GDP) of 2.134 billion yuan, compared with 201.