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.
Yunlian County, which belongs to Yibin City, Sichuan Province, is located in the southern margin of Sichuan Basin, the junction of Sichuan and Yunnan at the northern foot of the Yunnan-Guizhou Plateau, bordering Yunnan Yanjin, Yiliang and Weixin, and adjacent to Gao County and Gong County. Yunlian County is located in latitude 27 °50 °37 counties amptwitter, 28 °14 °14 °28 counties ampquotten, east longitude 104 °17 °17 counties amptwitter 104 °47 °20 counties amphibiquot; in between, the total area of the county is 1256 square kilometers. As a whole, the topography of Yunlian County is high in the south and low in the north, which is the transitional zone from Sichuan Basin to Yunnan-Guizhou Plateau. The main peak of the Great Snow Mountain in the southeast is 1777.2 meters above sea level; the Mutan River Valley in Tengda Town in the northeast is 368.5 meters above sea level, with a range of 1408.7 meters. The water system in the territory is vertical and horizontal, and there are rivers and streams all the year round.