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.
Ningshan County, which belongs to Ankang City, Shaanxi Province, is located at the southern foot of the middle part of Qinling Mountains, northwest of Ankang City, Zuoshui County and Zhenan County in the east, Shiquan County, Hanyin County and Hanbin District in the south, Foping County in the west and Changan District, Zhouzhi County and Changyi District in the north. Between latitude 33 °7 "11"-33 °50 "38" north and longitude 108 °2 "33"-108 °56 "48" east, it is more than 130km long from north to south and 110km wide from east to west, with a total area of 3678 square kilometers, making it the largest county in Ankang City. The name of Ningshan comes from the "Ningshan Hall" set up in the Qing Dynasty, which means "peaceful Shaanxi". It belongs to the northern subtropical humid climate, which is the transitional zone between the north and south of China and the watershed of the Yangtze River and Yellow River systems. It is the green barrier of the south pillow in Xi'an, the capital of Shaanxi Province, and the north of Ankang.