Legal analysis: 4 cents interest is usury. Usually, the interest of 4 cents refers to the monthly interest rate of 4%, which means the annual interest rate of 48%, and those who exceed the annual interest rate of 36% are usurers. According to the law, private lenders and borrowers can freely agree on interest, and only the agreed interest does not exceed 24% of the annual interest rate will be protected by law; The people's court shall support the borrower's request to the lender to return the interest paid in excess of 36% of the annual interest rate. The annual interest rate of more than 24% and not more than 36% belongs to the nature of debt. If the borrower has paid it, it can't claim it back, and the borrower doesn't have to pay it again.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 667 A loan contract is a contract in which the borrower borrows money from the lender, repays it at maturity and pays interest.

Article 680 It is forbidden to lend at high interest, and the loan interest rate shall not violate the relevant provisions of the state. If there is no agreement on the payment of interest in the loan contract, it shall be deemed that there is no interest. If the loan contract does not specify the method of interest payment, and the parties cannot reach a supplementary agreement, the interest shall be determined according to the local or the parties' trading methods, trading habits, market interest rates and other factors; Loans between natural persons are regarded as having no interest.