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.
Yanliang District of Xi'an is located in the northeast of the ancient city of Xi'an, 50 kilometers away from the city center, with a total area of 244 square kilometers. It is adjacent to Linwei District of Weinan City in the east, Sanyuan County in Xianyang City in the west, Jingshan Plateau in the north and Fuping County in Weinan City in the north, and Lintong District in Xi'an to the south by Qinghe River, which is located in the center of Weibei area. It has jurisdiction over 7 subdistrict offices, 24 communities and 73 administrative villages. Yanliang District has a resident population of 294700 (2017). Yanliang District has a well-developed aviation industry, which is a famous Chinese aviation city integrating aircraft design, manufacturing, appraisal, flight test, teaching and research. In March 2019, it was on the list of the first batch of revolutionary cultural relics protection and utilization districts and counties.