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.
Yaozhou District, which belongs to Tongchuan City, Shaanxi Province, is located on the southern edge of the Weibei Plateau in central Shaanxi, southwest of Tongchuan City, Xunyi County in the north, Sanyuan County in the south, Wangyi District and Yintai District in Tongchuan City in the northeast, Fuping County in the southeast and Chunhua County in the southwest. It is between 10834 miles east longitude and 109 degrees 06 east longitude and 34 degrees 48 miles north latitude and 35 degrees 19 degrees north latitude, with a total area of 1617 square kilometers. Yaozhou District, known as Yaoxian in ancient times, is the natural gateway from Guanzhong to northern Shaanxi, known as "Beishan lock key" and "Guanfu lapel throat". Yaozhou has a long history and profound cultural heritage. It used to be the ruler of Kangshi in ancient times, with a history of more than 2160 years. It was Sun Simiao, a medical scientist in the Sui and Tang dynasties, Fu Xuan, a philosopher in the Western Jin Dynasty, Liu Gongquan, a calligrapher in the Tang Dynasty, Linghu Deyi, a historian, and a landscape painter in the Northern Song Dynasty.