Because of the relocation, my younger brother and sister changed rooms, and I changed them for my younger brother, who has been decorated and moved in. He changed it for me and failed to turn in the key many times. What should I do?
Let's give priority to mediation first, so as not to hurt family ties. You can find a relative who is also persuaded by your brother as a mediator.
If mediation fails, you can only resort to law. The real estate license is your name. Just get the real estate back directly. Not your name, provide evidence of changing rooms, mainly written agreement, supplemented by recording.