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.
Yongdeng, known as Lingju and Zhuanglang in ancient times, belongs to Lanzhou City, Gansu Province, located in the central part of Gansu Province, longitude 102 °36'to 103 °45 'east, latitude 36 °12' to 37 °07 'north. It is bordered by Gaolan County and Jingtai County of Gansu Province to the east, Minhe County of Qinghai Province to the west, Honggu District and Xigu District of Lanzhou City to the south, and Tianzhu Tibetan Autonomous County to the north. The longest distance from south to north is 107km, and the widest distance from west to east is 101km, with a total area of 6090 square kilometers. As of 2010, Yongdeng County has jurisdiction over 13 towns and 5 townships. In 2010, the total population at the end of the year was 522000, and the resident population at the end of the year was 419400. In 2018, the county achieved a gross domestic product (GDP) of 10.831 billion yuan. On January 25, 2019, Yongdeng County was selected as 201.