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.
Bazhou is a county-level city hosted by Langfang City, and one of the first expanding counties and cities in Hebei Province, located in the east of Jizhong Plain in Hebei Province, located in the center of the triangle zone of Beijing, Tianjin and Bao, and belongs to the urban agglomeration around Beijing, Tianjin and Bohai Sea. It is 80 kilometers north of the capital Beijing, 70 kilometers east of the seaport city of Tianjin, and 65 kilometers west of the ancient city of Baoding. Has a long history, Qin belongs to Guangyang County, Han Zhuojun Yichang County, Zhou Xiande six years after the five dynasties (AD 959) built Bazhou. After Jin, Yuan, Ming and Qing dynasties, all of them were Zhili Guan. In 1913, the prefecture was changed into a county, which is a special zone of Jingzhao. In February 1990, the State Council approved the withdrawal of counties and the establishment of cities, which opened a new page in the history of Bazhou.