The criterion for judging whether it belongs to usury is whether the annual interest rate of the loan exceeds 36%, more than 24% is illegal and more than 36% belongs to usury.

Interest rates are divided into annual interest rate, monthly interest rate and daily interest rate. Their relationship is:

Annual interest rate = 12 * monthly interest rate = 360 * daily interest rate.

So you need to find out what the interest rate is first. 0.6% is definitely not the annual interest rate, and no lending institution will have such a low interest rate. So if it's a monthly interest rate:

Annual interest rate = 0.6 * 12 = 7.2%.

This interest rate is not usury, which is normal, because according to the current benchmark interest rate, the real interest rate is usually around 6%.

If 0.6% is the daily interest rate:

Then the annual interest rate = 0.6 * 360 = 2 16%, much more than 36%, which is usury.