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.
Huangyuan County is located in the west of Xining City. Chengguan Town, the county seat, is 52 kilometers away from the provincial capital Xining. The total area is 1509 square kilometers. The total population is 135004 (end of 2009). Mainly Han nationality, as well as Hui, Tibet, Mongolia, Tu and so on. Huangyuan County originally had jurisdiction over 2 towns, 6 townships and 1 ethnic township: Chengguan Town, Dahua Town, Dongxia Township, Riyue Tibetan Township, Heping Township, Bohang Township, Shenzhong Township, Bayan Township, Sizhai Township. The county people's government is stationed in chengguan town. On September 25, 2018, he won the honorary title of "2018 e-commerce into rural comprehensive demonstration county" of the Ministry of Commerce. In October 2018, it won the national leading area for the integration and development of the primary, secondary and tertiary industries in rural areas. On December 29, 2018, the sixth national unity and progress demonstration zone was named by the State ethnic Affairs Commission.