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.
Zhouzhi County, which belongs to Xi'an City, Shaanxi Province, is located in the west of Guanzhong, adjacent to the center line of Baima River in the east, Foping County and Ningshan County in the south, and Mei County and Taibai County in Baoji City in the west. Beipingwei River is adjacent to Wugong County, Xingping City, Yangling District and Fufeng County of Baoji City, between longitude 107o 39mm east and latitude 33 °42m 34 °14', with a total area of 2974 square kilometers and 68 kilometers away from Xi'an. Zhouzhi region is high in the southwest and low in the northeast, with a warm temperate continental monsoon climate. In the territory, there are the birthplace of Taoist culture, Lou Guantai, "the most blessed land in the world" and the birthplace of "Song of everlasting regret".