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.
Midu County is located in the west of Yunnan Plateau and the southeast of Dali Prefecture, bordering Xiangyun and Nanhua counties in the east, Jingdong and Nanjian counties in the south, Weishan County in the west and Dali City in the north. It is 320 kilometers east from the provincial capital Kunming, 61 kilometers north from Xiaguan, and 144 kilometers south from Manwan Power Station. It is one of the birthplaces of the Red River and the hinterbelt of the economic belt in the middle reaches of the Lancang River. in ancient times, it is known as "Liuzhao throat". It is a well-known hometown of lanterns and folk songs. The famous songs "Midu Folk Song", "embroidered purse" and "Ten Sisters" are known as the oriental serenade folk song "River dripping" from Midu. In 2010, Midu folk songs in Midu County, Yunnan Province, were selected into the third batch of national intangible cultural heritage list, traditional music project category, serial number 6.