Do you need to go through the formalities of property right change when you transfer the house?

After buying a second-hand house, you have to go to the property to change rooms. If you don't go through the change procedures, the property company should still be based on the original owner, because the original owner signed a property service contract with the property and you didn't handle the transfer, so you shouldn't sign a property service contract with the property, so you are not obliged to pay the property fee. In this case, the property should find the former owner to urge him to handle the property right change, otherwise the related expenses should be paid by the former owner. This is what attributes do.