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.
Dazhou, a prefecture-level city of Sichuan Province, is located in the east of Sichuan Province. it has a history of more than 1900 years since the establishment of the county in the Eastern Han Dynasty. With an area of 16591 square kilometers, Dazhou has jurisdiction over 2 municipal districts, 4 counties and 1 county-level city, plus a high-tech zone with a total population of 6.9 million (as of December 2018, the population of the central district of Dazhou was 1.025 million). Dazhou is a populous city, an agricultural city, a resource-rich city, an industrial town, a transportation hub and an old revolutionary base in Sichuan Province. Luojiaba site and Chengba site in Dazhou are the birthplace of the ancient Ba people and Ba Culture Center in the upper reaches of the Yangtze River. It is the center of Baqu culture in Sichuan, one of the three major gas fields in the country and the starting point of the national "Sichuan gas transmission from east". It is a comprehensive national natural gas.