"Shared credit line" means that all credit cards held by the same cardholder use the same credit line. For example, if A holds five credit cards of a bank with a credit line of 65,438+00,000 yuan, the five credit cards will jointly use the credit line of 65,438+00,000 yuan. When A overdraws 2000 yuan with one card, A can overdraw 8000 yuan with the other four cards.

Credit cards are issued by banks to individuals and units. They can make purchases, spend money and deposit and withdraw cash from banks through credit cards. The form is a card with the name, expiration date, serial number and cardholder's name printed on the front, and the card surface has a chip, a magnetic stripe and a signature strip.

Credit cards are issued to cardholders by banks or credit card companies according to the credit and financial resources of users. Cardholders don't need to pay cash when using credit cards, and the bills will be returned when they arrive.