Shuang 'an Town, Ziyang County, Ankang City, Shaanxi Province

China adopts a four-level six-digit coding system, with the first two representing provinces (municipalities and autonomous regions), the first three representing postal areas and the first four representing counties (cities). The last two digits indicate the delivery area of the city, that is, the location of the delivery area.

For example, the postal code "13002 1"13 "represents Jilin Province," 00 "represents Changchun, the provincial capital, and" 21"represents the delivery area.

I don't understand.