In addition to the common functions of GDB card, such as free cash withdrawal, free handling fee for cross-bank cash withdrawal, and half-price discount for merchants designated by GDB on Friday, you can also enjoy the installment discount of reducing handling fee when 12 expires when you buy digital products such as iPhone in Unicom business hall, and you can get 5 times points for overdraft cash withdrawal or purchase, which can be exchanged for GDB gifts or 3G packages designated by Unicom.