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.
Hualong District is the municipal district of Puyang City, which is located in the northeast of Henan Province and at the junction of Hebei, Shandong and Henan provinces. it was established in 1986, with a total area of 119square kilometers and cultivated land of 7360 hectares. In 2008, the total population was 349700, of which the agricultural population was 73000. In 2012, the GDP of Hualong District reached 7.083 billion yuan, the total retail sales of consumer goods reached 5.419 billion yuan, and the total investment in fixed assets of the whole society reached 9.84 billion yuan. Hualong District, the only administrative district under the jurisdiction of Puyang City, is the political, economic and cultural center of Puyang City and the headquarters of Zhongyuan Oilfield. Hualong District has been named as "National Advanced Zone for Scientific and technological Progress", "National Experimental Zone for Sustainable Development", "National Community Health Service demonstration area" and "National Social Security Ensemble".