In your case, it is estimated that the household registration book has also been changed to the same number as the ID card, because the ID card is made of household registration information, and the two must be the same. You can't change your account at the local police station, but the information in the computer has been changed. The reason should be that someone copied your ID card (copying usually happens to same-sex people born on the same day in the same year in the same police station, regardless of their names). As a result, the police station changed your number to 3 You used to be 1, followed by 0 and 7 as check codes, and 1 was the first ID number of men. If they were born on the same day, 1 is used for those who registered first, followed by 3, 5, 7 and 9. You can go to the household registration room of the police station to verify with your household registration ID card.