Phoenix (/ˈfiːnɪks/ FEE-niks; Navajo: Hoozdo; Spanish: Fénix or Fínix,[citation needed] Walapai: Banyà:nyuwá) is the capital and most populous city of the U.S. state
of Arizona, with 1,608,139 residents as of 2020. It is the fifth-most populous city in the United States, and the only U.S. state capital with a population of more than one million residents.
Phoenix is the anchor of the Phoenix metropolitan area, also known as the Valley of the Sun, which in turn is part of the Salt River Valley. The metropolitan area is the 11th largest by population in the United States, with approximately 4.85 million people as of 2020. Phoenix, the seat of Maricopa County, has the largest area of all cities in Arizona, with an area of 517.9 square miles (1,341 km2), and is also the 11th largest city by area in the United States. It is the largest metropolitan area, both by population and size, of the Arizona Sun Corridor megaregion.
Subei Mongolian Autonomous County, which is under the jurisdiction of Jiuquan City, is located in the northwest of Gansu Province, on the north and south sides of the western end of the Hexi Corridor. The county is divided into two disconnected areas, Nanshan and Beishan, with a total area of 66748 square kilometers. it is bordered by three counties and cities of one country and three provinces (regions). It has jurisdiction over 2 towns and 2 townships, with a total population of 11741 (2012), of which 4446 are Mongolian, accounting for 37.9%. Subei County had nomadic activities in the pre-Qin period; in the Western Han Dynasty, it was incorporated into the territory of the Central Plains Dynasty, belonging to Dunhuang County; after the continuous war, the ownership was changed repeatedly, the local regime and nomadic sphere of influence were crisscross, and the control of the central regime was weak. It belongs to Gansu Province since the Qing Dynasty, and Subei Bureau was set up in the Republic of China in twenty-five years (1937). Liberation in July 1950, 19