The address code (the first six digits of the ID card) indicates the administrative division code of the county (city, flag, district) where the permanent residence of the coding object is located when applying for the resident ID card for the first time.

2

The date of birth code (the seventh to fourteenth digits of the ID card) indicates the year, month and day when the coded object was born, in which the year is represented by four digits, and there is no separator between the year, month and day.

three

The serial code (ID number 15 to 17) is the distribution code of the police station under the jurisdiction of the county and district government. Each police station has a serial number of 10, in which odd numbers are male codes and even numbers are female codes. If there are more than two people on the same day of the same year, the second, third, fourth and fifth allocation codes will be postponed.

four

The check code (the last digit of the ID card) is a check code calculated according to the previous seventeen digit code and the check code of ISO 7064: 1983. MOD 1 1-2。