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.
Sanyuan County, Xianyang City, Shaanxi Province, is known as "Jiayi" in history and "Chiyang" in ancient times, which is located in the middle of Guanzhong Plain in Shaanxi Province. It is named after Xiyuan (also known as Qiliyuan), Central Plains (also known as Xinxingyuan) and Dongyuan (also known as Lingqian Yuan). Sanyuan is the ancient capital city, since the Northern Wei Taiping Zhenjun seven years (AD 446) home county, has a history of more than 1570 years, known as "food and clothing capital, hundreds of millions of mouth" reputation. County area of 576.9 square kilometers, commonly used arable land area of 491265 mu, jurisdiction 1 street office 9 towns 4 centers 172 administrative villages, the county's registered population of 408165 (2018). Sanyuan is located in the arc center of Xi'an, Xianyang, Weinan, Tongchuan and other surrounding large and medium-sized cities, connected with Lintong, Fuping and Yanliang in the east, Gaoling in the south and Jingyang and Chun in the west.