Legal analysis: Phased guarantee refers to the guarantee that the guarantor must provide for the loan before the borrower applies for the relevant certificates when using the mortgage of the house he purchased.

Legal basis: "People's Republic of China and Civil Code" Article 416 The main claim guaranteed by a chattel mortgage is the price of the mortgage, and if the mortgage registration is completed within ten days after the delivery of the subject matter, The mortgagee has priority in being paid over other security holders of the mortgage buyer, except lien holders.