Hello, what is the specific sign?
The upper left corner is usually the bank's logo, above it is the bank name, the upper right corner is the card type logo, for example, gold card is GOLD, and below the bank name is the card type, such as single credit card, global travel card wait.
In the middle is the bank card number.
The lower left corner is the validity period of the bank card. If it is a credit card, there is also the pinyin of the personal name in capital letters.
The lower right corner is the bank card logo, such as the UnionPay logo, visa logo, etc.
On the back of the bank card is a signature line, and if it is a credit card, there is also a CVV verification code. There are also bank customer service telephone numbers, etc.