Bank Card is a credit payment instrument issued to the society by commercial banks and other financial institutions and postal savings and remittance institutions with all or part of the functions of consumer credit, transfer settlement, cash deposits and withdrawals, etc. Bank cards include credit cards and debit cards. Because various bank cards are made of plastic and are used for deposits, withdrawals and transfer payments, they are also called "plastic money".

For mobile phone memory cards, different brands of mobile phone manufacturers have different production processes and hardware facilities. For example, the slot sizes of mobile phone memory cards are different. Memory card manufacturers also produce different sizes. Specifications of mobile phone memory cards to match the use of mobile phones with memory card slots of different sizes. And name these memory cards (such as TF card, MMC card) to distinguish these memory cards of different sizes.

Debit Card refers to a bank card that deposits first and then consumes (or withdraws cash) without overdraft function. According to their different functions, they can be divided into debit cards (including savings cards), special cards and stored-value cards. Debit card is a credit tool with functions such as transfer settlement, cash deposit and withdrawal, shopping and consumption. Debit cards cannot be overdrawn. Debit cards have the functions of transferring money, depositing and withdrawing cash, and spending money. A special card is a debit card used for special purposes in a specific area (purposes other than department stores, restaurants, and entertainment industries). It has the functions of transferring funds, depositing and withdrawing cash. A stored-value card is a prepaid wallet-type debit card in which the bank transfers funds to the card for storage at the request of the cardholder and deducts money directly from the card during transactions

Credit Card (English: Credit Card), also known as Credit card. It is a non-cash transaction payment method and a simple credit service.

It is issued by the bank to individuals and organizations. They can use it to shop and consume with special units and deposit and withdraw cash from the bank. It is in the form of a card with the name of the issuing bank, validity period, number and cardholder printed on the front. Name and other contents, there is a magnetic strip and signature strip on the back.

Credit cards are issued to cardholders by banks or credit card companies based on the user's creditworthiness and financial resources. Cardholders do not need to pay cash when using the credit card to make purchases, and repayment will be made on the billing date (English: Billing Date) .

Credit cards are divided into credit cards and quasi-credit cards. Credit cards are issued by banks and give cardholders a certain credit limit. The cardholders can consume within the credit limit and then repay. A credit card; a quasi-credit card refers to a quasi-credit card issued by a bank. The cardholder deposits a certain amount of reserve as required. When the reserve account balance is insufficient for payment, the quasi-credit card can be overdrawn within the prescribed credit limit. The so-called credit card generally refers to a credit card only