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.
Yumen is a county-level city under the jurisdiction of Jiuquan City, Gansu Province. It is located in the northwest of Gansu Province, west of Hexi Corridor, east of Jiayuguan City and Jinta County, west of Guazhou County, and adjacent to Subei Mongolian Autonomous County in the north and south. The geographical coordinates are between longitude 96 °15 & # 39 × 98 °30 & # 39 39, latitude 39 °40 & # 39 × 41 °00 & # 39; between 114km from east to west and 112.5 km from north to south, with a total area of 13500 square kilometers. By 2019, Yumen had jurisdiction over 2 new and old urban areas, 3 industrial parks, 10 towns and 2 ethnic townships, with a total population of 180000, including 29 ethnic minorities such as Han, Hui, Mongolian, Tibetan and Dongxiang. In 2018, Yumen achieved a GDP of 151.2.