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.
Hong'an, formerly known as Huang'an, is located at the southern foot of the Dabie Mountains in the northeast of Hubei Province, facing Wuhan to the south, Henan to the north, Macheng to the east, Huangpi and Dawu to the west. The county seat is 80 kilometers away from the provincial capital Wuhan and is about an hour's drive. It is an important part of Wuhan city circle. Hong'an County has a total land area of 1796 square kilometers and has jurisdiction over 12 townships and 396administrative villages. In 2017, Hong'an County has a total population of 700000, including 559000 in rural areas and 134600 in cities and towns. Hong'an is a typical agricultural county in mountainous areas, a key county in the new round of national poverty alleviation and development work, and a pilot county for the construction of old base areas across the country. Hong'an, with beautiful mountains and rivers and outstanding people, once nurtured the founder of Neo-Confucianism, famous philosophers Cheng Hao and Cheng Yi in the Northern Song Dynasty, and the "Tiantai Sangeng" (Geng Ying and Geng Ding) in the Ming Dynasty.