2 1200 1。 Because the address of Jiangsu University is located at No.301Xuefu Road, Jingkou District, Zhenjiang City, Jiangsu Province, according to the postal code database, the postal code of Jingkou District, Zhenjiang City, Jiangsu Province is 2 1200 1, in which the first two digits 2 1 represent the province, the third digit 2 represents the postal area, the fourth digit 0 represents the county or city, and the last two digits 0/.