Hangzhou (杭州), formerly romanized as Hangchow, is the capital and most populous city of Zhejiang Province in East China. It sits at the head of Hangzhou Bay, which separates Shanghai and Ningbo. Hangzhou grew to prominence as the southern terminus of the Grand Canal and has been one of the most renowned and prosperous cities in China for much of the last millennium. The city's West Lake, a UNESCO World Heritage Site, immediately west of the city, is amongst its best-known attractions.
Hangzhou is classified as a sub-provincial city and forms the core of the Hangzhou metropolitan area, the fourth-largest in China. During the 2010 Chinese census, the metropolitan area held 21.102 million people over an area of 13,353 square miles (34,585 square kilometers). Hangzhou prefecture had a registered population of 9,018,000 in 2015.
Information from:
en.wikipedia.org/wiki/Hangzhou 