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.
Sanmenxia, a prefecture-level city under the jurisdiction of Henan Province, is located in the south golden triangle of the Yellow River at the junction of Henan, Shanxi and Shaanxi provinces. the landform is mainly mountains, hills and loess plateaus, belonging to a warm temperate continental monsoon semi-arid climate, with a total area of 10496 square kilometers. it has jurisdiction over 2 districts, 2 counties and 2 county-level cities, with a total population of 2.308 million in 2018. Sanmenxia is known as "five mountains, four ridges and one division of Sichuan", with Guanzhong in the west, Sanjin in the north and the Central Plains in the east. Longhai Railway, Lianhuo Expressway, National Highway 310, Zheng (Zhou) West ('an) High-speed Railway running from east to west, 209 National Highway, San (Menxia) Li (Sichuan) Expressway and Haoji Railway connect the north and south. It is a regional transportation hub city that connects Henan, Shanxi and Shaanxi provinces, north to south, west to east. At the same time, Yangshao culture, Taoist culture and Guo culture are all