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.
Luqu County, which belongs to Gannan Tibetan Autonomous Prefecture of Gansu Province, is located in the southwest of Gannan Tibetan Autonomous Prefecture, the eastern edge of the Qinghai-Tibet Plateau, and the junction of Gansu, Qinghai and Sichuan provinces. The geographical coordinates are 101 °35 "36" to 102 °58 "15" east and 33 °58 "21" to 34 °48 "north latitude. As of October 2018, Luqu County has jurisdiction over 5 towns and 2 townships, with a total area of 5298.6 square kilometers and a resident population of 38000. Luqu County was officially established in June 1955. The main specialties of Luqu County are Tibetan mastiff and fern hemp pig. Zecha Stone Forest in Luqu County is not only one of the three famous tourist attractions in the county, but also a famous tourist attraction in Gannan Autonomous Prefecture and even Gansu Province. In 1998, Zecha Stone Forest was listed as a national nature reserve together with Gahai Lake.