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.
Guyuan, a prefecture-level city under the jurisdiction of Ningxia Hui Autonomous region, known as Dayuan, Gaoping, Xiaoguan and Yuanzhou in ancient times, is located in the south of Ningxia Hui Autonomous region, is a deputy central city of Ningxia Hui Autonomous region, and is located on the northwest edge of China's Loess Plateau. It is a typical continental climate; it has jurisdiction over 1 district and 4 counties, with a total area of 10540 square kilometers; by the end of 2018, the total number of permanent households in Guyuan is 352000, the total resident population is 1.2424 million, and the total registered population is 1.5077 million. Guyuan is located in the center of the triangle composed of the three provincial capitals of Xi'an, Lanzhou and Yinchuan, one of the five prefecture-level cities of Ningxia and the only non-Yellow River city. Shaanxi-Gansu-Ningxia Revolutionary Base Revitalization Planning Central City, South Ningxia Regional Central City, political, Economic, Cultural Center and Transportation Hub