Description: To verify the identity card numbers, identity card number must first understand the rules of the code. My identity card number by a number of digits, or a mixture of numbers and letters. Early from 15-digit ID composition, mainly in 1980, before issuing the identity cards of the millennium bug problem was taken into account, because of the identity card numbers of 15 only 1 January, 1900 to 1999 December 31 Number of people born, it also increased the number to 18 the rules of the identity card numbers.
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