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.
Suining, a prefecture-level city of Sichuan Province, also known as Doucheng and Suizhou, is located in the middle of Sichuan Basin. It is the regional central city of Chengdu-Chongqing Economic Zone, the modern industrial base of Sichuan Province, and the modern ecological garden city characterized by "heart-nourishing" culture. Chengdu is connected to the west, Chongqing, Guang'an and Nanchong to the east, Neijiang and Ziyang to the south, Deyang and Mianyang to the north, and an isometric triangle to Chengdu and Chongqing. Located in the main axis of the development of urbanization in Sichuan, it is one of the "six metropolitan areas" strategically deployed in Sichuan Province, and an important part of Chengdu economic circle and Chengdu plain urban agglomeration. Suining has a total area of 5300 square kilometers and has jurisdiction over 1 county-level city, 2 municipal districts and 2 counties. In 2018, the registered population is 3.6535 million and the city's GDP is 122.139 billion yuan. Located in the low hills of the central Sichuan Basin.