In the lawsuit, the parties can provide the following evidence beneficial to themselves: 1. Loan contract (loan application, loan vouchers, agreement and relevant written materials agreed by both parties to amend the loan contract); 2. Guarantee procedures (such as property guarantee or witness guarantee, etc.); 3. Certificates of materials and property guaranteed by loans; 4. The identity information of the guarantor, and the proof that the guarantor has the ability to pay off debts on his behalf; 5. Proof of the actual use of the loan; 6. Notice of repayment; 7. Voucher of repayment and interest payment; 8. Details and methods of interest calculation; 9. Basis of interest calculation; The choice of private lending prosecution court: A. If there is an agreement in the contract, ask questions quickly in the court under the agreed jurisdiction B, the defendant&;s domicile C, and the place where the contract is performed (the lender&;s location), and respond to things quickly and communicate directly.