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.
Nanxian County, which belongs to Yiyang City, Hunan Province, is located in the border of Hunan and Hubei provinces and the hinterland of Dongting Lake area. Nanxian County is connected with Shishou, Public Security and Songzi in Hubei Province in the north, Anxiang and Hanshou counties in Changde City in the west, Huarong County in Yueyang City in the east, Yuanjiang City in Yiyang City in the south, and Datong Lake, Beizhouzi, Jinpan, Nanwan Lake and Qianshanhong in the southeast, which is one of the 36 border counties in Hunan Province. In 1988, Nanxian County was approved as a "revolutionary base county" by the State Council. The land area is 1321 square kilometers, with a total population of 794100 (2009). South County under the jurisdiction of 13 towns and 2 townships, there are Luowen Huahai graffiti Village, Dechang Park, Maocaojie Bridge, Nanzhou Square, Nanzhou National Wetland Park and other scenic spots. In 2016, the GDP of the whole county was realized.