725300。 According to the information of China Postal Code Library, the postal code of Ziyang County, Ankang City, Shaanxi Province is 725300, and the postal code of China adopts a four-level six-digit coding structure, with the first two digits of 72 representing Shaanxi Province; The third digit 5 represents Ankang City; The fourth digit 3 indicates Ziyang County, and the last two digits 00 indicate the delivery office.