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.
Baiyin, prefecture-level city of Gansu Province. Located in the middle of Gansu Province, located in the transitional zone between the Loess Plateau and Tengger Desert, most of the territory is mountainous, mountainous and wide valley plain coexist; it is the transition zone from mid-temperate semi-arid zone to arid zone. The city has a total area of 21158.7 square kilometers and has jurisdiction over 2 districts and 3 counties. By the end of 2018, Baiyin had a resident population of 1.7342 million, an increase of 4900 over the end of last year. Baiyin City is located in the upper reaches of the Yellow River and the middle of Gansu Province, located in the confluence zone of the ancient Silk Road and the Yellow River, connecting the desert to the north, Qinghai and Tibet to the south, the Central Plains to the east and the western region to the west, 69 kilometers away from the provincial capital Lanzhou and 46 kilometers away from Zhongchuan Airport. It is a strategic channel connecting the subcontinental bridge, a transportation corridor and an energy logistics channel to countries along the Silk Road. The territory of Baiyin