3 100 13。 According to the postal code database of China, the postal code of Yuquan Campus of Zhejiang University is 3 100 13, and the address is Yuquan Campus of Zhejiang University in Xihu District, Hangzhou, Zhejiang Province. Postal code generally refers to postal code. Postal code is a coding method that a country or region divides the whole country in order to realize the automation of mail sorting and the digitalization of postal network and speed up the delivery of mail.