Legal analysis: First, the interest rate is four times higher than the bank's loan interest rate for the same period, which belongs to usury. Usury is illegal. Defined as usury, it generally earns more than 500 thousand illegally and will be sentenced to more than three years. It is believed that the legal boundary of usury should not simply take the bank's loan interest rate as the parameter, but should set the private lending guidance interest rate according to the actual situation in various places. Those who exceed the upper limit of the guiding interest rate constitute usury. The interest rate is four times higher than the bank's loan interest rate for the same period, which belongs to usury. Usury is illegal. Generally, the illegal profit is more than 500,000, and the sentence is more than 3 years.

Second, usury refers to loans with extremely high interest rates. It came into being at the end of primitive society and was the basic form of credit in slave society and feudal society. In other words, before the emergence of capitalist society and the establishment of modern banking system, private lending was of high interest. According to the provisions in the Notice of the People's Bank of China on Banning Underground Banks and Combating usury, the interest rate of private personal loans shall be determined by both borrowers and borrowers through consultation, but the interest rate determined through consultation between the two parties shall not exceed 4 times (excluding floating) the loan interest rate of financial institutions of the same grade at the same period announced by the People's Bank of China. Those who exceed the above standards should be defined as high-interest loans.

Legal basis: Article 680 of the Civil Code of People's Republic of China (PRC) prohibits high-interest loans, 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 payment method of interest, 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 interest-free.

Provisions of the Supreme People's Court on Several Issues Concerning the Application of Laws in the Trial of Private Lending Cases Article 25 If the lender requests the borrower to pay interest at the interest rate agreed in the contract, the people's court shall support it, except that the interest rate agreed by both parties exceeds four times the market quotation of one-year loan at the time of the establishment of the contract. The "one-year loan market quotation" mentioned in the preceding paragraph refers to the one-year loan market quotation issued monthly by the National Interbank Funding Center authorized by the People's Bank of China from August 20th, 20th, 20th19th.