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.
Zichang City, which is directly under the jurisdiction of Shaanxi Province and managed by Yan'an City, is located in the middle of the Loess Plateau, Hengshan District to the north, Zizhou County and Qingjian County to the east, Yanchuan County and Yanan County to the south, Ansai District and Jingbian County to the west, between longitude 109o1158 "- 110o0120022" east and latitude 36 °593030 "- 37 °300000N, with a total area of 2405 square kilometers. The county seat is 93 kilometers away from Yan'an and 430 kilometers away from the provincial capital Xi'an. In 31 (1942), in memory of the national hero Xie Zichang, he changed his name to Zichang County, the hometown of Xie Zichang, the foothold of the long March of the Central Red Army and the starting place of the Anti-Japanese Eastern Expedition. The late agrarian revolution was the seat of the CPC Central Committee and the Chinese Soviet government, and after the founding of the people's Republic of China.