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.
Changtai County (ancient Changtai County, Zhangzhou Capital) Zhangzhou County, Fujian Province, is located in the central junction of the Golden Triangle in southern Fujian, the lower reaches of the Jiulong River Estuary. Between 24 °33 degrees north latitude 24 °54 miles north, 117 °36 degrees east longitude 117 °57'. It connects Xiamen to the east, Zhangzhou Taiwan Investment Zone to the south, Hua'an and Zhangzhou to the west, and Anxi County, Quanzhou to the north. Provincial Highway 212 is connected with National Highway 324, National Highway 319 and Fuzhao Expressway. The Eagle-Xiamen Railway connects Changtai Railway Station with the national railway network. Longjin River Channel from Wu'an to Guokeng, Shima. The unique geomorphological structure of Changtai County can block the cold current in winter and typhoon in summer. Changtai County is a typical suburban county, a pilot county for comprehensive development of mountainous areas in China, a demonstration county for ecological construction in China and advanced environmental protection in Fujian Province.