First of all, you need to make it clear that overdue does not mean overdue beyond the interest-free repayment period, but refers to the grace period beyond three days after the repayment date, and the repayment amount is less than the minimum repayment amount stipulated by the bank.
Then, the overdue interest is calculated at 0.005%/ day. Besides the interest, Guangfa Bank will also charge you a late fee of 5% of the unpaid minimum amount (month/month).