There is no interest-free period for CCB credit card overdraft withdrawals, and a handling fee is required. The handling fee is charged at 0.5% of the cash withdrawal amount, with a minimum of 2 yuan and a maximum of 50 yuan. Interest will be charged in full from the day of each cash withdrawal, with an interest rate of 0.05% per day and compound interest calculated monthly. And the withdrawal limit per card per day is 10,000 yuan, and the cumulative amount cannot exceed 50% of the credit limit. Let me roughly calculate the cost for you. When withdrawing 3,500, the handling fee is 17.5 yuan/transaction; the interest is 1.75 yuan per day. For specific details, please refer to the bill settled by China Construction Bank.