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.
Renqiu City is a county-level city under the jurisdiction of Cangzhou City, Hebei Province, located in the middle of Hebei Province, west of Baiyangdian, is the hometown of doctor Bian Que, Huabei Oilfield headquarters is located. The city covers an area of 1012 square kilometers and has jurisdiction over 7 streets, 9 towns, 6 townships, 2 development zones (industrial parks) and 413 administrative villages. The total population is 867148 (2013). Renqiu is located in the north-central part of the North China Plain, mainly growing wheat, corn and other food crops. Rich in underground oil and natural gas resources, it is an important oil producing area and petrochemical base in North China. Renqiu is one of the major cities and cities designated by the State Council to open to the outside world and the economic circle around Beijing and Tianjin. Since the Ninth five-year Plan, Renqiu's comprehensive strength has been in the forefront of the "top 10" counties and cities in Hebei Province, and has been listed among the top 100 counties and cities in the country for many years in a row.