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.
Yongchang County, which belongs to Jinchang City, Gansu Province, is located in the northwest of Gansu Province, in the east of Hexi Corridor, the northern foot of Qilian Mountain and the southern edge of Alashan platform. It is bordered by Wuwei to the east, Jinchuan to the north, Shandan to the west and Sunan to the south. The geographical coordinates are 101 °04 east longitude 102 °43 mi, 37 °47 mi 38 °39'N. The longest distance from east to west is 144.8 km, and the widest distance from north to south is 144.55 km, with a total area of 7439.27 square kilometers. As of 2014, Yongchang County has jurisdiction over 6 towns and 4 townships, with a total of 111administrative villages, 917 village groups and 10 communities, with a total population of 235300 (by the end of 2017), mainly Han nationality, and ethnic minorities such as Mongolian, Hui and Pan. In 2017, Yongchang County realized the regional gross domestic product.