What do the 18-digit ID number mean differently? Let's take a look. 1-2 digits are the codes of provinces, autonomous regions, and municipalities directly under the Central Government; 3-4 digits are the codes of prefecture-level cities, leagues, and autonomous prefectures; 5- digits are the codes of prefecture-level cities, leagues, and autonomous prefectures;

What do the 18-digit ID number mean differently?

Let's take a look.

1-2 digits are the code of the province, autonomous region and municipality directly under the Central Government;

3-4 digits are the code of prefecture-level cities, leagues and autonomous prefectures;

5-6 digits are county, county-level city, district code;

7-14 is the date of birth, for example, 19670401 represents the birth of April 1, 1967;

The 15-17 digits are sequential codes, which are sequential codes for residents born on the same day in the same month of the same year within the area indicated by the same address code. The 17th digit indicates gender, with males being singular and females being even;

The 18-digit check code as the tail number is calculated by the number compilation unit according to the unified formula through the first 17 digits.