How to judge men and women from the penultimate ID number?

The penultimate ID card, the odd number is male and the even number is female. The penultimate digit of the ID number is the serial number, indicating that the address code area is a serial number compiled by people born on the same day of the same year. This order is not determined in the order of birth, but in the order of household registration.

Moreover, serial codes can distinguish between men and women. Because the even number of the sequence code is a girl and the odd number is a boy, and the sequence code also defines four numbers, 996, 997, 998 and 999, as specific numbers for people over 100 years old.

Provisions on identity card numbers.

The ID number consists of 18 digits, respectively indicating:

1, the first 1 and 2 digits indicate the code of this province.

2. The first 3 or 4 digits indicate the city code.

3. The first 5 or 6 digits indicate the area code.

4. The number 7 ~ 14 indicates the date of birth, 7, 8, 9 and 10 are the years, 1 1 2 are the months, 13 and 14.

5. The numbers 15 and 16 indicate the codes of local police stations.

6. The number 17 indicates gender: odd numbers indicate men and even numbers indicate women.

7. Bit 18 is the check code: the check code can be a number from 0 to 9, and is sometimes represented by X. ..

Refer to the above? Phoenix. com-How did the numbers on the ID card come from?