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.
Yinchuan, referred to as "Yin", is the capital of Ningxia Hui Autonomous region, a national historical and cultural city, and one of the important central cities in Northwest China. The military, political, economic, cultural, scientific research, transportation and financial center of the autonomous region is a comprehensive industrial city focusing on the development of light and textile industry and coordinated development of machinery, chemical industry and building materials industry. Located in the middle of Ningxia Plain, located on the western edge of Ordos in the east and Helan Mountain in the west, the Yellow River runs through the city. It is a famous historical and cultural city in China, a central city in the adjacent area of Ningxia, Inner Mongolia, Shaanxi and Gansu, and a node city of the Silk Road. it is a key economic zone for the in-depth implementation of the western development strategy. Yinchuan is an ancient city with a long history. Human beings thrived at the Shuidonggou site as early as 30,000 years ago. Yinchuan, the capital of the Xixia Dynasty in history, is a famous historical and cultural city of the country.