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.
Wuqi County, which belongs to Yan'an City, Shaanxi Province, is located in the northwest of Yan'an City, Dingbian County in the northwest, Zhidan County in the southeast, Jingbian County in the northeast, and Huachi County in Gansu Province in the southwest. The geomorphology belongs to the beam-shaped hilly and gully region of the Loess Plateau, with an elevation of 1233m between 1809 m. There are two major basins of Wuding River and Beiluo River in the territory, and the main structure of the terrain can be summarized as "Bachuan Erjian two mountainous areas". Since 1998, the policy of returning farmland to forests has been implemented, and the coverage rate of forest and grass has reached 49.6%. As of March 2019, Wuqi County has jurisdiction over 8 towns, 1 street office, 91 administrative villages and 8 urban communities, with a total area of 3791.5 square kilometers and a resident population of 152100 (2017), including an agricultural population of 106000. The oil industry is an important pillar of the economic development of Wuqi County.