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.
Yijun County, which belongs to Tongchuan City, Shaanxi Province, is located in the middle of Shaanxi Province, in the north of Tongchuan City, and at the junction of Guanzhong Plain and Northern Shaanxi Loess Plateau. The county seat is 120km south from the provincial capital Xi'an and 27km north from the Huangdi Mausoleum of Xuanyuan, with a total area of 1531 square kilometers. National Highway 210 and Tonghuang first-class highway pass through the border, known as the "flyover from Guanzhong to northern Shaanxi". Yijun County is not only named because of Yijun water, but also because it is suitable for kings to spend the summer. There are Yangshao cultural sites, Pengzu hometown, Northern Wei grottoes, Jiangnu tear Spring, Yunmeng Mountain Taoist resort, the warring States and Wei Great Wall, among which Yijun and the warring States Wei Great Wall was included in the World Cultural Heritage list of the Great Wall of China. As of 2018, Yijun County has jurisdiction over 1 street, 6 towns and 1 township. In 2017, the resident population of Yijun County was 92100.