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.
Yuzhong County, under the jurisdiction of Lanzhou City, Gansu Province, is located in the central part of Gansu Province, near Qilihe and Chengguan District to the west, Anding District of Dingxi City to the east, Lintao County to the southwest, Pingchuan District of Baiyin City to the north, and Jingyuan County and Huining County to the northeast; it is high in the south and low in the middle, with a temperate continental climate, with a total area of 3301.64 square kilometers, and has jurisdiction over 8 towns and 15 townships. In 2017, there are 13 ethnic minorities with a registered population of 469083. Yuzhong County passes through the ancient Silk Road in three ways. Xinglong Mountain is a national 4A scenic spot and a national nature reserve. Qingcheng, an ancient town, is listed as a "national historical and cultural town" because of its historical and cultural relics and the ancient buildings of the Ming and Qing dynasties. The traffic in the county is more developed, such as Lanxin second Line, Lanyu Railway, Baolan passenger Special Railway, etc.