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.
Zijin County, which belongs to Heyuan City, Guangdong Province, is located in the east and middle of Guangdong Province, the southeast of Heyuan City, and the east bank of the middle reaches of Dongjiang River. Between longitude 114o 40mm / m 115 °30m east and latitude 23 °10m / m 23o 45' north. The county is 88.6km long from east to west and 64km wide from north to south, with a total area of 3627 square kilometers. Zijin County is located in the subtropical monsoon climate zone. The climate is mild, with plenty of light and rainfall. As of 2018, Zijin County has jurisdiction over 18 towns, 273 village committees, 27 community neighborhood committees, 4410 villagers' groups and 4410 resident groups (including Guzhu Town and Linjiang Town, Jiangdong New area). The county government is stationed in Zicheng. Zijin County has been inhabited by human beings in the Neolithic Age. After the Qin and Han dynasties, the Han nationality in the Central Plains gradually moved southward, with the local minority.