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.
Langao County, which belongs to Ankang City, Shaanxi Province, is located in southern Shaanxi, at the northern foot of Dabashan Mountain, bordering Chengkou County of Chongqing City in the south, Hanbin District of Ankang City in the north, Ziyang County in the west and Pingli County in the east, with a maximum elevation of 2641 meters and a minimum elevation of 331m. It covers an area of 1956 square kilometers, with a total population of 168200 (2017). Langao Nangong rice field was selected as "China's beautiful countryside, 2012 China's best leisure town, one of the most beautiful cities in China." Langao County was founded in the Qing Dynasty, there are Nangongshan, Lanhe rafting and other scenic spots, known as the hometown of Chinese konjac. In 2013, the GDP of Langao County reached 3.1 billion yuan, an increase of 14% over 2012. On February 2, 2019, by the State Administration of traditional Chinese Medicine