According to the information of postal code library, the postal code of Xujing Town, Qingpu District, Shanghai is 20 1702 and the area code is 0 18.

The first two digits of postal code represent provinces (autonomous regions and municipalities directly under the Central Government), the third digit represents postal areas (a province is divided into several postal areas, namely mail distribution and transportation networks), the fourth digit represents counties (cities), and the last two digits represent post offices and their delivery areas.