Private lending is protected by law. However, the interest rate not exceeding four times the interest rate of similar bank loans is protected by law, while the excess part belongs to usury, which is not protected by law.
 [Legal Basis]
 Article 680 of the Civil Code prohibits usurious lending, and the interest rate of borrowing may not violate the relevant provisions of the State. If the loan contract does not stipulate the payment of interest, it shall be deemed that there is no interest.
 If the loan contract does not clearly stipulate the payment of interest, and the parties cannot reach a supplementary agreement, the interest shall be determined according to the local or parties' trading methods, trading habits, market interest rates and other factors; Borrowings between natural persons shall be deemed as interest free.