The ID number with the beginning of 440101 indicates that the place of birth account is Guangzhou, Guangdong Province; The administrative code of Guangzhou City, Guangdong Province is 440101; The first six digits of the ID card are 440101, all of which were born in Guangzhou, Guangdong Province. For example, the ID number is 44010119940930817X, and the first six digits are 440101, which is the regional administrative code, and the representative area is Guangzhou, Guangdong Province; The 7th to 14th digits (September 30, 1994) are the date of birth information, indicating the date of birth on September 30, 1994; The 15th to 17th digits (817) are regional serial numbers, which are compiled for people born in the same year, the same month and the same day in Guangzhou, Guangdong Province. The odd numbers of serial numbers are assigned to men and the even numbers to women, so this ID card number is male; The 18th digit (X) as the check code of the tail number is calculated by the numbering unit according to a unified formula.