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.
Yongjing County, which belongs to Linxia Hui Autonomous Prefecture of Gansu Province, is located in the southwest of central Gansu, in the north of Linxia Hui Autonomous Prefecture, bordering Lanzhou in the northeast, Liujiaxia Reservoir (now known as Bingling Lake) in the south, and Minhe County in Qinghai Province in the northwest. It is located between longitude 102 °53'E and latitude 35 °47'N and latitude 36 °12'N, with a total area of 1863.6 square kilometers (2010). The population is 205600 (2012). In 2012, Yongjing County achieved an annual GDP of 330 million yuan. Yongjing County has Liujiaxia, Liujiaxia Dinosaur National Geopark, Bingling Temple Grottoes and other famous scenic spots. Yongjing County, known as "Hezhou North Township", is one of the first counties open to the outside world, a key county for poverty alleviation and development, and also a Liujiaxia and salt pan.