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.
Weiyuan County belongs to Dingxi City, Gansu Province. Weiyuan County is located in the middle of Gansu Province, the central and western part of Dingxi City, 174km away from the provincial capital Lanzhou and 55 km away from Longhai Railway Longxi Station. The geographical coordinates are 104 °02km east longitude and 35 °07km north latitude, with a total area of 2065 square kilometers. As of 2011, Weiyuan County has jurisdiction over 8 towns and 8 townships, a total of 3 communities, 217 administrative villages and 1536 village groups, with a total population of 351700, mainly Han nationality, and ethnic minorities are Hui, Tibetan, Manchu and Mongolian, accounting for less than 1% of the total population. In 2011, the gross domestic product (GDP) of Weiyuan County reached 1.61171 billion yuan, an increase of 12.8% over 2010.