Where are the last three digits of the signature column on the back of China Construction Bank Longka?

This code is only provided on the back of the credit card. This is the CVV/CVC code. I'll give you a picture and you'll know. There are seven numbers on the right side of the signature column on the back of the card. The four digits of the signature are the last four digits of your credit card number, and this verification code is slightly separated.