What you should ask is what contract is the provident fund loan based on when buying and selling second-hand houses? Based on the purchase contract, sales agreement, housing evaluation report and bank running list. In the process of buying and selling second-hand houses, if buyers choose to use provident fund loans, they generally need to sign provident fund loan contracts. This kind of contract is signed between the purchaser and the provident fund management center, which is used to stipulate the interest rate, repayment method, loan term and repayment responsibility of the provident fund loan, and is the basis and guarantee of the provident fund loan. Before signing the provident fund loan contract, buyers need to provide some information, such as purchase contract, sales agreement, housing evaluation report, bank running bill, etc. To prove your credit status and willingness to buy a house. At the same time, the provident fund management center will review the loan application according to the repayment ability and credit status of the buyers, and finally decide whether to approve the loan.