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.
Sichuan, referred to as Sichuan or Shu, is one of the 23 provinces in China, the capital of Chengdu. It is located in the inland of southwest China, bounded by 26 °03 north latitude 34 °19 miles north latitude and 97 °21 miles east longitude 108 °12 'east longitude, connecting Chongqing to the east, Yunnan and Guizhou to the south, Tibet to the west, Shaanxi, Gansu and Qinghai to the north. The geomorphology of Sichuan Province varies greatly from east to west, and the topography is complex and diverse. it is located in the transitional zone between the first Qinghai-Tibet Plateau and the second plain of the middle and lower reaches of the Yangtze River, which is located in the Chinese mainland topography. The topography is high in the west and low in the east. It is composed of mountains, hills, plain basins and plateaus. Sichuan Province has three major climates, namely, the humid climate in the middle subtropics of Sichuan Basin, the subtropical semi-humid climate in the mountains of southwest Sichuan, the alpine plateau climate in northwest Sichuan, and the overall pleasant climate.