The ID card1* * has 18 digits, and the last four digits represent the meaning:
The numbers from 1. in the number from 15 to 16 represent the code of the police station to which the user belongs.
2. The number 17 represents the gender of the user, with odd numbers for men and even numbers for women.
3. The number 18 is the user's check code, which is calculated by the relevant production unit according to the formula. The tail number is usually 0-9. If the calculation result is 10, the suffix will be replaced by X. ..
Extended data:
I. Basic procedures for applying for and issuing identity cards:
Citizens shall, within three months from the date of reaching the age of 16, go through the application procedures at the public security organ where the permanent residence is located, submit their household registration book and photos, fill in the registration form for applying for resident identity cards, and pay the certificate fee.
If a citizen under the age of 16 voluntarily applies for a resident identity card, his guardian shall apply for a resident identity card on his behalf.
When going to apply for a permit, you should bring your household registration book, two color photos of yourself (you can also collect photos on the spot) and the original first-generation resident ID card.
When going through the formalities, it is necessary to fill in the registration form of resident ID card application and collect the fingerprint of ID card, assist the staff to accurately check the registration items of ID card and pay the application fee.
Second, the validity period of the resident identity card.
The validity period of resident identity cards is divided into five years, 10 years, 20 years and long term.
/kloc-under the age of 0/6, issue a resident identity card with a validity period of 5 years; 16 to 25 years old, and issue resident identity cards valid for 10 years; From the age of 26 to 45, a resident identity card with a validity period of 20 years will be issued; If you are over 46 years old, you will be issued a long-term valid resident identity card. The validity period of the certificate is calculated from the date of issuance.
Reference source:
People's Network-Do you know what the number on the ID card stands for?
Baidu Encyclopedia-Resident ID Number
Baidu encyclopedia-ID card