Is the tail number of male ID card singular or even?

Singular. Men and women can be distinguished according to the odd number and even number at the end of the ID card, where the odd number is male and the even number is female. The digits of the ID number are 18, which consists of 17-digit ontology code and 1-digit verification code. The number 17 indicates gender: odd numbers indicate men and even numbers indicate women.

The number 18 of the ID number is a check code, a personal information code, a number from 0 to 9, and is sometimes represented by X, which is randomly generated by the computer.

Identity cards are divided into real identity cards and electronic identities, which are mostly issued to citizens by governments of various countries or regions to prove the identity of the holders.

Identity card is a legal document used to prove the identity of the holder, and it is also an important identification document for everyone.