2. At present, China's national identity card number consists of 18 digits: the first 6 digits are the address code, the 7th to 14 digits are the birth date code, the 5th to 17 digits are the sequence code, and the 8th digit is the check code. The inspection code is "0, 1, 2,10" * * *1digit. When the inspection code is "10", in order to ensure that the citizen ID number is 18 digits, it is represented by "X". Although the check code is "X" and cannot be replaced, if it needs to be represented by numbers, just convert the 18 citizenship number into the 15 resident ID number, and remove the 7th to 8th digits and the last 1 digit.
3. Numbers 1~6 are area codes, where numbers 1 and 2 are provincial government codes, numbers 3 and 4 are prefecture-level government codes, and numbers 5 and 6 are county government codes. Such as 13 (Hebei Province) 04 (Handan City) 29 (Yongnian County).
4, 7~ 14 digits are the date of birth.
5. The number 15~ 17 is the serial number, which is the distribution code of the police station under the jurisdiction of the county and district government. The distribution code of each police station is 10 continuous numbers, such as "000-009" or "060-069", where odd numbers are male distribution codes and even numbers are female distribution codes. Take the same year as an example. For example, 007 is a boy and there are at least two boys born in the same year. Their last four places are 00 1* and 003*.
6. Bit18 is a parity bit (identification code), which is calculated by a complicated formula and generally automatically generated by a computer. It is a check code with 17 bits in front. If you change a number in front, and the check code in the back doesn't respond to the change, it will be judged as an illegal positive number by the calculation software. X is also one of verification codes.