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.
Dongchuan District, belonging to Kunming City, Yunnan Province, is located in the northeast of Yunnan Province and the northernmost end of Kunming City, 150km away from Kunming, adjacent to Huize County, Qujing City, Yunnan Province in the east, Xundian County, Kunming City in the south, Luquan County, Kunming City in the west, Qiaojia County, Zhaotong City, Yunnan Province in the north, and across the Jinsha River from Huili County and Huidong County, Liangshan Prefecture, Sichuan Province, with a total area of 1858.79 square kilometers. Dongchuan District is located on the northern edge of the Yunnan-Guizhou Plateau, with the highest elevation of 4344.1 meters, the lowest elevation of 695 meters, and the height difference of 3649.1 meters. Dongchuan District is rich in mineral resources and is one of the six major copper production bases in China. Jiaozi Snow Mountain is known as "the first mountain in central Yunnan". The Xiaojiang basin is a typical rainstorm and debris flow area in the world, which is called "the natural museum of debris flow". Both sides of the Xiaojiang River are Kunming.