The middle eight digits of this credit card do not divide the fixed card number structure according to the region. The credit card has 16 digits, and the first 6 digits represent the card organization identification code and card category. The last few digits are the randomly generated card number, where the last digit is the check digit. Therefore, it cannot be said that the CCB credit card in a certain area can determine what the 8-digit number is. If you want to find the card number, you can ask the card owner to call CCB’s 400 customer service hotline to contact manual inquiry, or you can bring your ID card to a CCB branch to inquire.