公民身份号码是特征组合码18位：由十七位数字本体码和一位数字校验码组成。排列顺序从左至右依次为：六位数字地址码，八位数字出生日期码，三位数字顺序码和一位数字校验码。 -citizenship number is the combination code 18 : 17 figures Ontology yards and a digital-correcting code components. Sequencing from left to right were : six figures addresses code, date of birth eight digital code, a three-digit number sequence and a digital code correcting code.