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.
Chengmai County is located in the northwest of Hainan Island, the county around the Beibu Gulf Urban agglomeration, adjacent to Haikou, the provincial capital. It has been bought for more than two thousand years since the first year of Yuan Feng of the Western Han Dynasty (110 BC). It is one of the three famous historical cities of Hainan during the Western Han Dynasty (that is, hawksbill turtle, purple shellfish and chicory). The county has a population of about 590000 people, with a land area of 2076 square kilometers and a sea area of 1100 square kilometers. Haiyu Central, West Route, West Ring Island Expressway, Middle Route Expressway, Round City Expressway, Yue-Hai Railway and West Ring High-speed Rail all pass through the territory. Chengmai County has successively won more than 60 national honors, such as "hometown of Longevity in the World", "famous Green County in China", "Best Leisure Tourism County in China", "demonstration County in the Construction of Beautiful villages in China", and "Ten famous Tourism Counties with Cultural characteristics". March 2017, finalists for "2017"