The ID number beginning with 42038 1 represents the birth account in danjiangkou city, Shiyan City, Hubei Province; The administrative code of danjiangkou city is 42038 1, and the first six digits of ID cards are 42038 1, all of which are danjiangkou city ID cards.

For example, the ID number is 42038 1198404235525, and the first six digits, 420381,are regional administrative codes, representing danjiangkou city, Hubei.