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.
Huining County, which belongs to Baiyin City, Gansu Province, is located in the central part of Gansu Province, at the southern end of Baiyin City; the terrain is tilted from southeast to northwest, with undulating beams and ravines; it is a mid-temperate semi-arid climate with a total area of 6439 square kilometers. As of 2018, Huining County has 24 towns and 4 townships under its jurisdiction, with a resident population of 543900. Huining County is known as the "lock key of Qin long". As early as the Neolithic Age more than 5000 years ago, human beings lived and multiplied in the territory. Zuli County was set up in the third year of Emperor Yuanding of Han Dynasty (114BC), which has a history of more than 2100 years. In October of the 25th year of the people's Republic of China (1936), the three main forces of the Chinese Workers' and Peasants' Red Army successfully reunited in Huining, which was the turning point of the Chinese revolution. In 2018, Huining County realized the GDP (GDP).