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.
Pingliang, prefecture-level city of Gansu province. Located in the east of Gansu Province, the eastern foot of Liupan Mountain and the upper reaches of Jinghe River, it is the geometric center of Shaanxi-Gansu-Ningxia "Golden Triangle", across Longshan (Guanshan), east of Xianyang, Shaanxi, west of Dingxi and Baiyin of Gansu, south of Baoji of Shaanxi and Tianshui of Gansu, and adjacent to Guyuan of Ningxia and Qingyang of Gansu to the north. Pingliang is an important animal husbandry base and fur distribution center in northwest China, and the main agricultural and forestry product production base and animal husbandry in Gansu Province. Pingliang, known as "Longshang dry Wharf", is an important city that must pass through the ancient "Silk Road". It is historically known as "the first city of Chang'an in the west". Since ancient times, Pingliang has been an important town for the barrier of the three Qin dynasties and the control of Wuyuan. It is a "must-contend place for soldiers" and a traditional commodity distribution center in Longdong. The traffic and military focal point of the Central Plains leading to the western region and the eastern end of the ancient Silk Road, not only in the northwest region.