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.
Yanchi County, located in the east of Ningxia Hui Autonomous region, is a county under the jurisdiction of Yinnan region and a famous Tan sheep producing area in Ningxia. The border area between the agricultural and nomadic peoples of China in history. The county government is stationed in Huamachi town. County from southeast to northwest for the vast dry steppe and desert steppe, rich in "salt, fur, sweet licorice". Ningxia Tan Sheep, which is well-known at home and abroad, is the main economic source of Yanchi. There are more than 20 natural salt lakes in the north, east and southwest of the county, so it is named "salt pond". On December 7, 2016, Yanchi County was listed as the third batch of national comprehensive pilot areas for new urbanization. On September 29, 2018, the government of Ningxia Hui Autonomous region approved Yanchi County to withdraw from the sequence of poor counties. On October 22, 2018, he was selected as the first for the integrated development of the primary, secondary and tertiary industries in rural areas in 2018.