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.
Tianmen, known as Jingling in ancient times, is a municipality of Hubei Province, an important member of Wuhan City Circle and the urban agglomeration in the middle reaches of the Yangtze River, and the main node cities in the Han River Basin, located in the middle of Hubei Province and the north of Jianghan Plain, reaching Dahongshan in the north, Hanjiang River in the south and Wuhan in the east. In the fourth year of Emperor Yongzheng of the Qing Dynasty (1726), Tianmen Mountain was named "Tianmen". In 1994, the State Council approved Tianmen City to be directly under the jurisdiction of Hubei Province. In 2018, the city's resident population was 1.2723 million. Tianmen is an important birthplace of world tea culture, the hometown of Lu Yu, the largest hometown of overseas Chinese in the interior, and the hometown of steamed vegetables in China. It is a national sanitary city and a national garden city. It ranks among the top 100 county economies in the country and has been rated as one of the top 100 county economies for 12 consecutive years.