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.
Zizhong County, which belongs to Neijiang City, Sichuan Province, is located in the middle of Sichuan Basin, the middle reaches of Tuojiang River, with latitude 29 °34'~ 30 °24 'north and longitude 104 °27' ~ 105 °07 'east. It is adjacent to Anyue County of Ziyang City and Dongxing District of Neijiang City to the east, to the south of Neijiang City and Weiyuan County, Renshou County and Weiyuan County of Meishan City to the west, and Yanjiang District of Ziyang City to the north. 143 kilometers away from Chengdu and 197 kilometers away from Chongqing, it is one of the first 27 powerful counties in Sichuan. Zizhong County covers an area of 1733.96 square kilometers and has jurisdiction over 22 towns. at the end of 2016, the county's total registered population was 1.2791 million. In 2016, the county's gross domestic product (GDP) reached 25.594 billion yuan, an increase of 8.1 percent over 2015. The territory is affected by rock strata and the topography is in the west.