The postcode of Jincheng Street, Lin 'an District, Hangzhou is 3 1 1399. Hangzhou, known as Lin 'an and Qiantang in ancient times, is a prefecture-level city, provincial capital city, sub-provincial city and megacity under the jurisdiction of Zhejiang Province. It is the core city of Hangzhou metropolitan area, the economic, cultural and scientific center of Zhejiang Province approved by the State Council, and one of the central cities in the Yangtze River Delta. By the end of 2002 1, the whole city had jurisdiction over 10 municipal districts, 2 counties and1county-level cities, with a total area of 16850 square kilometers, permanent population of122.04 million and urban population of 1203.