1, through the Public Security Bureau: need to provide personal address information, date of birth and gender; must follow the relevant procedures and legitimate reasons;
2, check the ID number: ID number contains the address of the place of birth or report the location of the household registration and the date of birth information;
3, calculate the age: the current date Subtract the date of birth on the ID card;
4, to determine the adult: according to Chinese law, natural persons over eighteen years of age are adults.
Coding rules for ID cards:
1. Bits 1-2 indicate the codes of provinces, autonomous regions and municipalities directly under the central government;
2. Bits 3-4 indicate the codes of prefectural-level cities, leagues and autonomous regions;
3. Bits 5-6 indicate the codes of county-level cities, counties and districts;
4. Bits 7-14 indicate the day and month of the year of birth, e.g., January 1, 1990 is indicated as 19900101;
4. Bits 7-14 indicate the day and month of birth. The 15th-17th bits indicate the sequence code, with odd numbers assigned to males and even numbers to females;
6. The 18th bit is the check code, which is used to check the correctness of the ID card.
In summary, checking the age of an ID card can be achieved by providing personal information to the Public Security Bureau and following the legal procedures, directly checking the date of birth information in the ID card number, calculating the difference between the current date and the date of birth on the ID card, or determining whether or not you have reached the legal age of majority in China (eighteen), and each of these methods has its own specific application scenarios and requirements.
Legal basis:
The Resident Identity Card Law of the People's Republic of China
Article 5
The validity period of the resident identity card of a citizen above the age of sixteen is ten years, twenty years, or a long period of time.1. If a person is between the age of sixteen and twenty-five, he/she shall be issued with a resident identity card with a validity period of ten years. 2. If a person is between the age of twenty-six and forty-five, he/she shall be issued with a resident identity card with a validity period of Twenty years of identity cards. 3, forty-six years of age or older, issued a long-term validity of the identity card. 4, citizens under the age of sixteen, voluntarily apply for a resident identity card, issued a resident identity card valid for five years.