Mortgage, as the name implies, must be registered as mortgage. After the establishment of the mortgage, if the debtor fails to fulfill his promise at maturity, the mortgagee has the right to discount the mortgaged property or take the sale price of the mortgaged property as the priority for other creditors to be compensated according to law. From the legal point of view, mortgage refers to the legal act that the debtor or the third party mortgages certain property to the creditor as a guarantee for paying off debts. It mainly occurs in mortgage loans issued when banks buy real estate or discount non-real estate projects in pawn shops.