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.
Tieshan District, located in the west of Huangshi City, Hubei Province, is rich in mineral resources and is named for its rich iron ore. More than 1700 years ago, the ancestors dug and smelted here. Dongfangshuo studied here in the Han Dynasty; Yue Fei, a national hero, forged the "sword of Daye" here; at the end of the Qing Dynasty, Zhang Zhidong, governor of Huguang, built China's first large-scale open-pit iron ore, Daye Iron Mine, which was the largest in East Asia at that time. Tieshan became the cradle of China's modern iron and steel industry. Tieshan District Railway connects Beijing-Guangzhou and Beijing-Kowloon two major transport arteries, and National Highway 106 runs through the whole territory. Tourist attractions include Yellowstone National Mining Park, Luzhangshan Park, Tieshan Temple, Huazang Temple and so on. During the 12th five-year Plan period, Tieshan will invest 20 billion yuan to build the "Iron City of the World".