The 230 yuan interest deducted by the Liangju Credit Card Platinum Card is due to the borrowed amount. A credit card, also called a credit card, is a credit certificate issued by a commercial bank or credit card company to consumers with qualified credit. It takes the form of a card with the issuing bank's name, validity period, number, cardholder's name and other contents printed on the front, and a magnetic stripe and signature strip on the back. Consumers holding credit cards can shop or consume at specially designated commercial service departments, and then the bank will settle the accounts with merchants and cardholders. Cardholders can overdraft within the prescribed limit.