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.
Luqu County, which belongs to Gannan Tibetan Autonomous Prefecture of Gansu Province, is located in the southwest of Gannan Tibetan Autonomous Prefecture, the eastern edge of the Qinghai-Tibet Plateau, and the junction of Gansu, Qinghai and Sichuan provinces. The geographical coordinates are 101 °35 "36" to 102 °58 "15" east and 33 °58 "21" to 34 °48 "north latitude. As of October 2018, Luqu County has jurisdiction over 5 towns and 2 townships, with a total area of 5298.6 square kilometers and a resident population of 38000. Luqu County was officially established in June 1955. The main specialties of Luqu County are Tibetan mastiff and fern hemp pig. Zecha Stone Forest in Luqu County is not only one of the three famous tourist attractions in the county, but also a famous tourist attraction in Gannan Autonomous Prefecture and even Gansu Province. In 1998, Zecha Stone Forest was listed as a national nature reserve together with Gahai Lake.