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.
Sihong County, under the jurisdiction of Suqian City, Jiangsu Province, is located in the northwest of Jiangsu Province, the lower reaches of the Huaihe River, Hongze Lake to the east and Anhui to the west, located in the cross-radiation area of the Yangtze River Delta Economic Zone and the Huaihe River eco-economic belt, with an administrative area of 2731 square kilometers and a population of 1.1 million. It is the hometown of famous wine, crab and eco-tourism in China. Sihong is the wine capital of China. Shuanggou Daqu, one of the top ten famous wines, is produced here. Sihong sits on 40% of the water surface of Hongze Lake, one of the four major freshwater lakes in China, and is embedded in the national Hongze Lake Wetland Park. Sihong gave birth to an ancient civilization. Fifty thousand years ago, the people of Xiacaowan lived here after the water and thrived. It is one of the centers of biological evolution in the Cenozoic world, and it is also one of the centers of human origin.