Legal basis: Article 3 of the Measures for the Administration of Urban Real Estate Mortgage The term "real estate mortgage" as mentioned in these Measures refers to the act that the mortgagor provides the mortgagee with debt performance guarantee with his legal real estate without transferring possession. When the debtor fails to perform the debt, the creditor has the right to be paid in priority with the proceeds from the auction of mortgaged real estate according to law. The term "mortgagor" as mentioned in these Measures refers to a citizen, legal person or other organization that provides legally acquired real estate to the mortgagee as a debt guarantee for himself or a third party. The term "mortgagee" as mentioned in these Measures refers to the citizens, legal persons or other organizations that accept real estate mortgage as the debtor's debt guarantee. The term "pre-purchased commercial housing loan mortgage" as mentioned in these Measures refers to the behavior that after the purchaser pays the down payment, the loan bank pays the remaining house payment and mortgages the purchased commercial housing to the loan bank as a loan repayment guarantee. The term "mortgage of construction in progress" as mentioned in these Measures refers to the act that the mortgagor, in order to obtain the construction loan of construction in progress, mortgages the legally obtained land use right together with the investment assets of construction in progress to the loan bank as a loan repayment guarantee without transferring possession. Article 4 Where the legally acquired ownership of a house is mortgaged, the land use right within the occupied area of the house must be mortgaged at the same time. Twenty-fifth real estate mortgage, mortgage parties shall sign a written mortgage contract. Article 26 A real estate mortgage contract shall include the following main contents: the name and domicile of the mortgagor or mortgagee; The type and amount of principal creditor's rights; The location, name, condition, construction area, land area and scope of the mortgaged real estate; The value of mortgaged real estate; Occupation manager, occupation management mode, occupation management responsibility and responsibility for accidental damage or loss of mortgaged real estate; The time limit for the debtor to perform the debt; Conditions for the loss of mortgage; Liability for breach of contract; Dispute resolution methods; (ten) the time and place of conclusion of the mortgage contract; (eleven) other matters agreed by both parties.