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.
Shangcai County is located in the southeast of Henan Province, belonging to Zhumadian City, 60 kilometers from east to west, with a total area of 1529 square kilometers and a total population of about 1.084 million (2010) is a plain agricultural county. Shangcai County is the seat of Ancient Cai State, the hometown of Li Si of Qin Xiang and Zhai Fangjin of Han Xiang, the ancestral land of Cai at home and abroad, and the birthplace of "Chongyang Culture". The eight scenic spots of Gucai have been listed as places of interest and historic sites under national protection. It was designated as the Historical and Cultural Landscape Tourism Development Zone in 1995. On January 25, 2019, he was selected as the national "Ping an Agricultural Machinery" demonstration county in 2018. In November 2019, it was selected into the second batch of counties (districts) for the construction of a water-saving society.