Zhengzhou[b] is the capital of Henan, China. Located in northern Henan, it is one of the nine national central cities in China,[6] and serves as the political, economic, technological, and educational center of the province.[7] The Zhengzhou metropolitan area (including Zhengzhou and Kaifeng) is the core area of the Central Plains Economic Zone.[8][9] The city lies on the southern bank of the Yellow River.[10] Zhengzhou is a major hub of China's domestic and international transportation network; for example, it is connected to Europe[11] and has an international airport.[12] Zhengzhou is a National Civilized City [zh] and a State-list Famous Historical and Culture City.[13] 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.[14]