What if the birth certificate is different from the household registration book?

The previous name column on the household registration book, as long as the name is indicated on the child's birth certificate.

1, once the baby's birth certificate is issued, the name on it cannot be changed. Even if it is reissued later, it can only be based on the name registered when the child was born.

2. There is a column of "used name" in the household registration book. Just fill in the name on the birth certificate in the column of "previous name" to avoid trouble.