How to transfer Tianjin hukou?

In principle, the account is left to the brother-in-law. I'm not sure what to do. You first go to the police station where your hukou is located to issue a certificate, and then take the hukou book to the police station where your brother-in-law is located. . . It should take months. . . The score here is low, but it depends on whether you can keep up, because the exams vary from place to place. . .