How to distinguish between men and women in the mantissa of ID card?

The penultimate ID card can judge men and women, with odd numbers for men and even numbers for women. The penultimate digit of the ID card number is the serial number, which is compiled for 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, the sequence code has a careful machine, which can distinguish between men and women. Because even numbers of serial codes are girls and odd numbers are boys. Moreover, the sequence code also sets four numbers, 996, 997, 998 and 999, as the specific numbers of people over 100 years old.

Digital coding rules of address code in Chinese mainland resident ID card number,

The first and second place represent provincial administrative regions. The first number is the previous area code. The second digit is the code of the province and city where the region is located. China is divided into eight regions: North China (1), Northeast China (2), East China (3), Central South China (4), Southwest China (5), Northwest China (6), Taiwan Province Province (7) and Hong Kong and Macao (8).

The third and fourth places represent prefecture-level administrative regions. Where 0 1-20 and 5 1-70 represent prefecture-level cities; 2 1-50 stands for regions, autonomous prefectures and leagues; 90 represents the county-level administrative units directly under the provincial government; In the municipal ID card, 0 1 indicates the municipal district and 02 indicates the county.

The fifth and sixth places represent county-level administrative regions. 0 1- 18 refers to the municipal districts or regions, autonomous prefectures and county-level cities under the jurisdiction of the Union; 2 1-80 represents counties and flags; 8 1-99 stands for county-level administrative units directly under the provincial government.

The seventh to fourteenth digits of the ID number indicate the year, month and day when the coded object was born, in which the year is represented by four digits, and there is no separator between the year, month and day. For example:1981May 1 1 daily1981051. According to GB/T7408.

The digits from 15 to 17 of the ID number indicate the serial numbers assigned to people born in the same year, month and day in the area marked by the same address code. Among them, the seventeenth odd number is for men and the even number is for women. The last digit is the check code calculated according to the first seventeen digits of the code and the check code.

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