The one-year interest rate for the convenience card in Huaihua, Hunan is 9,125 yuan. The credit card overdraft is 50,000 yuan, and the interest for one year is 9,125 yuan. Banks calculate interest on credit card overdrafts at 50,000 per day. If it is caused by consumption overdraft, there will be an interest exemption period. After the interest exemption period, the interest will be calculated at 50,000 per day.