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.
Dunhua City, which belongs to Yanbian Korean Autonomous Prefecture, is the "west gate" of Yanbian Prefecture. Located in the eastern mountainous area of Jilin Province, the hinterland of Changbai Mountain, one of the node cities in the pilot area of Changjitu development and opening up, it is the largest county-level city in Jilin Province and an important transportation hub in Jilin Province. it connects Jilin and Heilongjiang provinces, four districts and nine counties and cities. Dunhua is known as the "century-old county, the ancient capital of thousands of years". It is the capital of the Bohai Sea in the Tang Dynasty, Aodong City in the Ming and Qing dynasties, and the birthplace of the Manchu royal family. In 1881, a county was established and named Dunhua; in 1958, the county under the jurisdiction of the province was assigned to Yanbian Korean Autonomous Prefecture, and the county was withdrawn to set up a city in 1985. Dunhua is an excellent tourist city, a national sanitary city, a national garden city, a national model city with double support, a model collective of national unity and progress, and the name of Chinese solid wood products.