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.
Mado, which means "the source of the Yellow River" in Tibetan, is located in the northwest of Guoluo Tibetan Autonomous Prefecture in Qinghai Province, in the south of Qinghai Province, in the northwest of Guoluo Tibetan Autonomous Prefecture, and belongs to Guoluo Tibetan Autonomous Prefecture. Mado County is bordered by Dulan County, Haixi Mongolian Autonomous Prefecture in the north, Xinghai County in Hainan Tibetan Autonomous Prefecture and Maqin County in Guoluo Tibetan Autonomous Prefecture in the east, Dari County in Guoluo Tibetan Autonomous Prefecture and Shiqu County in Sichuan Province in the south, Qumalai County in Yushu Tibetan Autonomous County in the west, and Yushu Tibetan Autonomous Prefecture in the southwest. It is 207km wide from north to south and 228km long from east to west, with a total area of 25253 square kilometers. The average altitude is more than 4200 meters, and the annual average temperature is-4 ℃, which belongs to alpine steppe climate. Lake Eling, Lake Zaling, Lake Donggezona, Xingjinghai,