A: Credit card installment payment is called interest-free, but there is a handling fee (equivalent to interest). The credit card consumption of China Merchants Bank is 25,000 yuan, and it is repaid in 12 installments. The one-time payment fee is 25,000 * 0.6% *12 =1.800 yuan. The down payment is 25,000 yuan/12+1800 = 3,883.33 yuan.