China Industrial and Commercial Bank of China UnionPay credit card security code is the last 3 digits of the signature strip printed on the back of the credit card.
The security code of UnionPay card China UnionPay card is called CVN2 card verification number 2, which has 3 digits and is printed on the back of the credit card with 4 digits after the card number.
The UnionPay standard card organized by UnionPay is called CVN2, MasterCard is called CVC2, VISA is called CVV2, and AE American Express is called CSC2.
The way of password verification is that the bank extracts the card account number, validity period and service code, arranges them and then calculates them through a series of complicated algorithms. After this set of numbers is generated, only the issuing bank and the holder of the bank card know what this number is.
The above is the relevant information of ICBC credit card security code.