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.
Dingxi is a prefecture-level city under the jurisdiction of Gansu Province, located in central Gansu, commonly known as "Longzhong"; it is located in the confluence area of the Loess Plateau and West Qinling Mountains, with large ups and downs, vertical and horizontal mountains and different shapes; its climate type belongs to the south temperate zone semi-humid-mid-temperate zone semi-arid zone, the continental monsoon climate is obvious; the city's total area is 20330 square kilometers, under the jurisdiction of 1 district, 6 counties; 2018 resident population 2.8217 million. Dingxi is a national summer resort observation city, with more than 60 tourist attractions and tourist spots. Weiheyuan, Guiqing Mountain, Shade Mountain, Langdu Wetland grassland and Taohe tourist promenade are all places for summer leisure. Dingxi not only gave birth to Li culture, but also the intersection of prehistoric cultures such as Majiayao, Qijia, Siwa, Xindian and other prehistoric cultures and important calligraphy and painting in the country.