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.
Daye, a county-level city under the jurisdiction of Hubei Province, administered by Huangshi City, is located in the southeast of Hubei Province, the south bank of the middle and lower reaches of the Yangtze River, the hinterland of Hubei "Metallurgical Corridor", an important part of Wuhan city circle, with a total area of 1566.3 square kilometers. Daye is the birthplace of Chinese bronze culture. More than 3000 years ago, Chinese ancestors mined and smelted copper in Daye, creating a bronze civilization. The Tonglushan ancient copper mine site in the territory is known as "the ninth wonder of the world". It has been listed in the National Archaeological site Park project and the preliminary list of "World Cultural Heritage", and has been awarded the Guinness record of "Ancient Copper Mine with the longest continuous Mining time". Tonglushan Sifangtang site was selected as one of the Top Ten Archaeological discoveries in China in 2015. As of