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.
Zizhong County, which belongs to Neijiang City, Sichuan Province, is located in the middle of Sichuan Basin, the middle reaches of Tuojiang River, with latitude 29 °34'~ 30 °24 'north and longitude 104 °27' ~ 105 °07 'east. It is adjacent to Anyue County of Ziyang City and Dongxing District of Neijiang City to the east, to the south of Neijiang City and Weiyuan County, Renshou County and Weiyuan County of Meishan City to the west, and Yanjiang District of Ziyang City to the north. 143 kilometers away from Chengdu and 197 kilometers away from Chongqing, it is one of the first 27 powerful counties in Sichuan. Zizhong County covers an area of 1733.96 square kilometers and has jurisdiction over 22 towns. at the end of 2016, the county's total registered population was 1.2791 million. In 2016, the county's gross domestic product (GDP) reached 25.594 billion yuan, an increase of 8.1 percent over 2015. The territory is affected by rock strata and the topography is in the west.