20 1799。 According to the information in China Postal Code Library, Qingpu, Shanghai is located in Qingpu District, Shanghai with the postal code of 20 1799. China postal code adopts four-level six-digit coding structure, and the first two digits of 20 represent Shanghai. The third digit 1 stands for Shanghai; The fourth digit 7 represents Qingpu District, and the last two digits 99 represent the delivery office.