1. CCB credit card cash withdrawal: CCB credit card cash withdrawal is 4,000 yuan, and the handling fee is 0.5% of the cash withdrawal amount, that is, 20 yuan.
2. WeChat cash withdrawal: WeChat cash withdrawal fee of 4,000 yuan 4 yuan.
3. CMB credit card withdrawal: CMB credit card withdrawal fee of 4,000 yuan 40 yuan. The handling fee of China Merchants Bank's credit card withdrawal is 1% of the withdrawal amount, and 4,000 yuan * 1% = 40 yuan. The final repayment amount is principal+interest+handling fee, 4000+60+40=4 100 yuan.