The postal code is 723300. According to the national postcode database, the postcode of Yangxian County, Hanzhong City, Shaanxi Province is 723300. Postal code usually consists of Arabic numerals, which represents the special code of the post office that delivers mail, and is also the communication code between residents and units within the delivery range of the post office. When delivering letters and parcels, be sure to indicate the postal code, so as to realize the automation of mail sorting and the digitalization of postal network and speed up mail delivery.