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.
Huaiyuan County belongs to Bengbu City, Anhui Province. It is located in the north of Anhui Province, the middle reaches of the Huaihe River, the southern end of the Huaibei Plain, Guzhen, Bengbu and Fengyang to the east, Huainan to the south, Fengtai and Mengcheng to the west, and Hanxi and Suzhou to the north. It is between 116o 45km east longitude 11709' and 32o 43km north latitude 33 °19', with a total area of 2391.02 square kilometers. Huaiyuan County was founded from the Yuan Dynasty to the 28th year of the Yuan Dynasty (1291), known as the "Pearl on the Huaihe River" reputation, popular folk flower drum lanterns, places of interest are Bailuquan, Bian Hedong, Wanghe Tower and so on. In August 2018, the Anhui provincial government approved Huaiyuan County to withdraw from the poverty-stricken county. In 2018, Huaiyuan County has jurisdiction over 15 towns and 3 townships, with 1 farm and 2 development zones, achieving a GDP of 319. 5%.