Zhengzhou
Zhengzhou (, ; ), also spelt Zheng Zhou and alternatively romanized as Chengchow, is the capital and largest city of Henan Province in the central part of the People's Republic of China. Located in north-central Henan, it is one of the National Central Cities in China, the centre of Central Plains area, and serves as the political, economic, technological, and educational center of the province. The Zhengzhou metropolitan area (including Zhengzhou and Kaifeng) is the core area of the Central Plains Economic Zone. The city lies on the southern bank of the Yellow River. Zhengzhou is a major hub of China's national transportation network, with railways connecting Zhengzhou to Europe and an international airport. Zhengzhou is a and a State-list Famous Historical and Culture City. As of 2020, there are two World Cultural Heritage Sites in Zhengzhou. The Zhengzhou Commodity Exchange (ZCE) is China's first futures exchange. Zhengzhou Airport Economy Zone is China's first Airport Economy Zone. As of the 2020 Chinese census, the prefecture-level city of Zhengzhou had a population of 12,600,574 inhabitants, whom 10,260,667 lived in its built-up (or metro) area made of 6 urban districts plus Zhongmu county, Xinzheng and Xingyang cities now largely being conurbated. The city had a total GDP of 1.014 trillion (RMB) in 2018. Greater Zhengzhou was named as one of the 13 emerging mega-cities in China in a July 2012 report by the Economist Intelligence Unit, and officially named as the eighth National Central City in 2017 by the central government in Beijing. Zhengzhou is a major city for scientific research, appearing among the world's top 100 cities as tracked by the Nature Index. The city is home to several national key universities in China, notably Zhengzhou University, Henan University, Henan Agricultural University, Henan University of Chinese Medicine, and Henan University of Technology. History The Shang dynasty established Aodu () or Bodu () in Zhengzhou. This prehistorical city had become abandoned as ruins long before the First Emperor of China in 260 BC. Since 1950, archaeological finds in a walled city in Eastern Zhengzhou have provided evidence of Shang dynasty settlements in the area around 1600 BC. Outside this city, remains of large public buildings and a complex of small settlements have been discovered. The site is generally identified with the Shang capital of Ao and is preserved in the Shang dynasty Ruins monument in Guanchen District. The Shang, who continually moved their capital due to frequent natural disasters, left Ao at around 13th century BC. The site, nevertheless, remained occupied; Zhou (post-1050 BC) tombs have also been discovered. Legend suggests that in the Western Zhou period (1111–771 BC) the site became the fief of a family named Guan. From this derives the name borne by the county (xian) since the late 6th century BC—Guancheng (City of the Guan). The city first became the seat of a prefectural administration in AD 587, when it was named Guanzhou. In 605 it was first called Zhengzhou—a name by which it has been known virtually