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.
Haidong is a prefecture-level city under the jurisdiction of Qinghai Province, named because it is located to the east of Qinghai Lake; it belongs to the mosaic zone from the Loess Plateau to the Qinghai-Tibet Plateau, with a semi-arid continental climate; the city has a total area of 13200 square kilometers and has jurisdiction over 2 districts and 4 autonomous counties; in 2017, it has a resident population of 1.4708 million. Haidong has a long history. In the long historical evolution, Hehuang region has changed from the primitive nomadic state of "living after water and grass" to a more developed farming civilization. The people of all ethnic groups in Hehuang have jointly developed and built this land, creating a splendid history and culture. In December 2016, it was listed as the third batch of national comprehensive pilot areas for new urbanization. In 2017, the GDP of Haidong City was 43.6 billion yuan, an increase of 8.4 percent over the previous year at comparable prices. Among them, the added value of the primary industry