Everyone knows that the current ID card number has two formats, one is a 15-bit number (such as 340501761217022), one is 18-bit number (eg 340503197001090319). In the 15-digit number, the 7-12 digits (such as 761217) indicate the birth time of the witnesses (such as December 17, 1976), and the 15th digits (such as 2) indicate the gender of the holder (odd) "Male", even "female"); in the 18-digit number, the 7th and 14th digits (such as 19700109) indicate the birth time of the witnesses (such as January 9, 1970 (such as 1) Indicates the gender of the holder.
