What are the top 7 numbers of China Industrial and Commercial Bank Guilin Kaka?

The first bank card number is 6, which is a card supporting UnionPay. The first place of all bank cards is the second to fifth place of cards supporting UnionPay, representing the bank to which they belong. For example, 2220 represents the sixth digit of ICBC and the card type. For example, "2" is the seventh to tenth digits of the debit card and the eleventh to eighteenth digits of the secondary branch code of the bank to which it belongs, that is, the nineteenth (last) digit of the card is the check number.