居民身份证的号码是按照国家的标准编制的,由18位数字组成:前6位为行政区划代码,第7至第14位为出生日期码,第15至17位为顺序码,第18位为校验码。作为尾号的校验码,是由号码编制单位按统一的公式计算出来的,如果某人的尾号是0~9,都不会出现X,但如果尾号是10,那 The ID number is compiled according to national standards and consists of 18 digits: the first 6 digits are the administrative divisions code, the 7th to 14th digits are the birth date codes, the 15th to 17th digits are the ordinal digits, and the 18th digit For the check code. The check code as the tail number is calculated by the numbering unit according to a unified formula. If someone’s tail number is 0 ~ 9, X does not appear, but if the tail number is 10, then