1. renegotiate the contract: renegotiate and modify the terms of the contract with the other party, and adjust the contract price to the evaluated price or close to the evaluated price. This needs to be negotiated with each other and both parties agree.

2. Provide additional guarantee: If the bank thinks that the loan amount is relatively high, it can provide additional guarantee measures to increase the security of the loan. For example, other assets can be provided as collateral, or others can be found as borrowers or guarantors.

3. Self-raised funds: If the loan fails, you can consider raising some funds to fill the difference. This can be achieved by saving, borrowing or raising funds from friends and relatives.