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.
Hexian County, which belongs to Maanshan City, Anhui Province, is located in the east of Anhui Province, the north bank of the lower reaches of the Yangtze River, between 118 °04 °29 'and 31 °22 °32 °03' north latitude, with a total area of 1319 square kilometers. The topography of Hexian County is long from north to south and narrow from east to west, tilting from northwest to southeast. Hexian belongs to the north subtropical humid monsoon climate zone with four distinct seasons. As of 2018, he County has jurisdiction over 9 towns and 3 functional areas. The county government is stationed in Liyang Town, with a registered population of 542200. Hexian ancient name Liyang, home county has a history of more than 2200 years. 221 BC, home Liyang County, belongs to Jiujiang County. In 555, Nanliang and Beiqi negotiated peace here, and then changed their name to Hezhou. After the Revolution of 1911, it was renamed Hexian. Middle Pleistocene human fossils have been found in Hexian County.