If the borrower is imprisoned during the loan period, he can entrust his relatives and friends to repay the loan on time. Otherwise, if the borrower fails to repay the loan on time, he needs to pay a certain amount of overdue interest according to the agreement or relevant state regulations, and bear corresponding liabilities for breach of contract. Legal objectivity:

Article 676 of the Civil Code of the People's Republic of China * * * If the borrower fails to repay the loan within the agreed time limit, it shall pay the overdue interest in accordance with the agreement or relevant state regulations. Article 678 of the Civil Code of the People's Republic of China * * * The borrower may apply to the lender for extension before the repayment period expires; If the lender agrees, it can be extended. Article 667 of the Civil Code of the People's Republic of China is a loan contract in which the borrower borrows money from the lender, returns the loan at maturity and pays interest.