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.
Longmatan District, which belongs to Luzhou City, Sichuan Province, is located in the south of Sichuan Basin, at the confluence of the Yangtze River and Tuojiang River. It intersects with Lu County in the west and north, Jiangyang District in the south and Lu County and Jiangyang District in the east. Longmatan District is the trade, logistics, economic and passenger transport center of Luzhou. It is a developed economic and trade area of Luzhou and one of the three main cities of Luzhou. At the same time, the Lingang area in southern Sichuan, a free trade pilot zone in China (Sichuan), is located in Longmatan District. Longmatan District covers an area of 332.64 square kilometers and has jurisdiction over 7 streets and 5 towns. In 2013, Longmatan District had a total registered population of 357000 and a resident population of more than 500,000. GDP reached 16.188 billion yuan, an increase of 13.1% over 2012 at comparable prices. On February 2, 2019, it was rated as the national base at the county level by the State Administration of traditional Chinese Medicine.