1·Passport number Passports have numerical or alphanumerical designators (" serial number ") assigned by the passport issuing authority.
护照号护照具有由护照颁发机构分配的数字或字母数字表示(“系列号”)。
2·The child is the character information item, meaning that the item contains alphanumerical characters.
子项是字符信息项，即包含字母数字字符的项。