Interest refers to the reward that the currency holder (creditor) gets from the borrower (debtor) for lending money or monetary capital. Including deposit interest, loan interest and interest generated by various bonds. Under the capitalist system, the source of interest is the surplus value created by hired workers. The essence of interest is a special transformation form of surplus value and a part of profit.
What is usury?
According to the relevant provisions of the Supreme People's Court's Opinions on People's Courts Handling Lending Cases: "The interest rate of private lending may be appropriately higher than that of banks, but the maximum interest rate shall not exceed four times that of similar loans of banks." Therefore, the principal of private lending is protected, and the interest that does not exceed 4 times the interest rate of similar loans of banks is also protected by law, and the excess is not protected by law.
In other words, private lenders and borrowers (including individuals and enterprises) can freely agree on loan interest, and the interest rate can be higher than the bank's interest rate for the same period, but it can't exceed four times the bank's loan interest rate for the same period at most. The excess will be recognized as usury and not protected by law.