According to the postal code database, the postal code of Xixiang County, Hanzhong City, Shaanxi Province is 723500, in which the first two digits 72 represent Shaanxi Province, the third digit 3 represents Hanzhong City, the fourth digit 5 represents Xixiang County, and the last two digits 00 represent the delivery office in the area where Xixiang County is located.