There is no interest-free treatment for overdraft withdrawal. The handling fee is 0.5% (lowest in 2 yuan and highest in 50 yuan), and the interest is 0.5% per day (monthly compound interest).

For example, if you withdraw 2000 yuan, it will generate 2000*0.5%= 10 yuan's cash withdrawal fee and 2000*0.05%= 1 yuan/day's interest.

From the date when the withdrawal is recorded to the date when you repay the withdrawal, compound interest will be calculated monthly.