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.
Boai County is located at the southern foot of Taihang Mountain, northwest of Jiaozuo City, and adjacent to Zezhou County of Jincheng City in the north. It is bordered by Jiaozuo City in the east, Wuyi County and Xiuwu County in the east, Qinyang City in the west and Geqin River in Wenxian County in the south. Boai County has jurisdiction over Qinghua Town Street Office and Hongchang Street Office, Xuliang Town, Yueshan Town, Baishan Town, Motou Town, Xiaojing Town, Jincheng Town and Zhaihuo Township, with a total area of 435 square kilometers, with an area of about 300000 mu of arable land and a population of 436000 people. In 2018, the county's GDP increased by 8.2%, the added value of the tertiary industry increased by 7.5%, and the total retail sales of consumer goods increased by 11.5%. In March 2019, it was selected into the list of the first batch of revolutionary cultural relics protection and utilization districts and counties. The second batch of national agricultural products quality and safety counties. The seventh batch of national unity and progress