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.
Huayuan County, which belongs to Xiangxi Tujia and Miao Autonomous Prefecture of Hunan Province, is located in the west of Hunan Province, in the middle of Wuling Mountains, at the junction of Hunan, Guizhou and Chongqing. In 2016, Huayuan County had jurisdiction over 3 townships and 9 towns. Huayuan County has a total population of 312700, with a total area of 1109.35 square kilometers. The proven reserves of Huayuan Manganese Mine ranks the second in Hunan Province, the second in China, and the second in Hunan Province and the third in China, with the reputation of "Oriental Manganese Capital" and "hometown of Nonferrous Metals". Huayuan is an old revolutionary base county and a key county in national poverty alleviation and development work. There are the sites of ancient human activities 100000 years ago, the ancient battlefield sites of Qianjia Miao uprising, Shen Congwen's border town tea cave and other cultural landscapes; there are also large and small Longdong waterfalls, border town tea cave scenic spots, ancient Miao River ruins