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.
Zhangjiachuan Hui Autonomous County belongs to Tianshui City, Gansu Province, located in the southeast of Gansu Province, northeast of Tianshui City, bordered by Longxian County, Shaanxi Province in the east, Qingshui County in the south, Qinan County in the west, and Huating and Zhuanglang counties in the north. With a total area of 1311.8 square kilometers (2010) and a population of 332496 (2011), e-commerce has entered the rural comprehensive demonstration county. In 2011, Zhangjiachuan achieved a GDP of 1.76576 billion yuan. Zhangjiachuan Hui Autonomous County has Guanshan Qinjiayuan scenery, wheat accumulation, Huaguoshan Shuiliang Cave and other famous scenic spots. In December 2019, Lintan County won the seventh batch of national unity and progress demonstration areas (units).