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.
Lu County is the lower jurisdiction county of Luzhou City, Sichuan Province, which is located in the south of Sichuan Basin, between longitude 105 °10 °50 "~ 105 °45 °30" east longitude and latitude 28 °54 °40 "~ 29 °20 °00" north. Lu County is bordered by Yongchuan District of Chongqing City and Hejiang County of Luzhou City in the east, Longmatan District and Jiangyang District of Luzhou City in the south, Fushun County of Zigong City in the west, and Rongchang District of Chongqing City and Longchang City of Neijiang City in the north. Lu County is a major national cultural relic county, with 6 key cultural relics protection units such as Longnaoqiao and Song Tombs in Luxian County. It is a national construction and labor base county, a national model county with double support, a national health city, and one of the top 100 counties in the western region. On February 2, 2019, it was rated as a county-level national advanced unit of traditional Chinese medicine by the State Administration of traditional Chinese Medicine.