If the daily interest rate is 0.05% and the loan is 1 ten thousand yuan, the interest charged for one day is 10000×0.05%=5 yuan; The interest charged for one month is:10000× 0.05 %× 30 =150 yuan; The interest to be charged for one year is:10000× 0.05 %× 360 =1800 yuan.

The daily interest rate of 0.05% is converted into monthly interest rate 1.5% and annual interest rate 18%. The state has stipulated that the annual interest rate within 24% belongs to legal interests and is protected by law; 24% to 36% is natural debt, which can be accepted by the lender if the borrower is willing to bear it; More than 36% is a high interest rate, and the excess is invalid and not protected by law.