The registration process in which the mortgagee or the owner of the mortgaged property applies to the real estate registration agency for cancellation of the real estate mortgage. This is mainly to ensure the legitimate rights and interests of collateral cases, because if the registration is not cancelled, the mortgagee has the right to dispose of the collateral again without the borrower's knowledge, which will lead to related legal and property risks. Cancellation of registration is to confirm that the mortgage right has been lifted, and the owner of the mortgaged property has complete property rights and can enjoy complete property rights benefits.