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.
Kang County, which belongs to Longnan City, Gansu Province, is located in the southeast of Gansu Province, southeast of Longnan City, and at the junction of Gansu, Sichuan and Shaanxi provinces. Kang County was known as Connecticut in ancient times, and was later incorporated into Wuzhou (Jizhou) after the Northern Zhou Dynasty, and Zhikang County in 1929. Kang County has jurisdiction over 18 towns and 3 townships, with a total area of 2958.46 square kilometers and a total population of 202000 (2015). In the Longnan Mountains on the south side of the West Qinling Mountains in Kangxian County, the elevation is between 560-2483 meters above sea level, which belongs to the transition from subtropical zone to warm temperate zone, with abundant rainfall, humid climate, sufficient light and forest coverage of 66.7%. It is known as "Longshang Jiangnan" and "Longshang Xishuangbanna". The natural resources of Kangxian County include water resources, biological resources, mineral resources and so on, with a total output value of 1.922 billion yuan in 2015. Kangxian County