I don't know that the credit card information of the Postal Savings Bank can't be known by other postal savings banks. The credit card information of this bank is strictly protected. Postal savings credit card is a RMB credit card, which is a UnionPay standard card. It has all the functions and services of UnionPay standard credit card and can be used freely at home and abroad. The card is valid for three years and can be equipped with four supplementary cards.