Buying foreign exchange with domestic bank cards means changing local currency cash into foreign currency cash to buy cash, and the handling fee is slightly higher than that of buying foreign exchange, which is embodied in the daily foreign exchange selling price (the price that banks sell to customers) and the cash selling price issued by China Bank.
The balance of China bank cards processed abroad is different from the available balance, which is the balance that can be used. The account balance is the actual balance on the account. If the account balance on your debit card is different from the available balance.