If the bank has a file, you can ask the bank for it, or combine other evidence to prove the fact of borrowing. In case the loan contract is lost, the borrower can go to the handling bank and ask the bank to give a new original contract. When you apply for a copy of the contract from the bank, you only need to bring your own identity documents.

Legal basis: Article 29 of the Law of People's Republic of China (PRC) Commercial Bank shall follow the principles of voluntary deposit, freedom of withdrawal, interest-bearing deposit and confidentiality for depositors. Commercial banks have the right to refuse any unit or individual to inquire, freeze or deduct personal savings deposits, except as otherwise provided by law.