After you open an account (there is an agreement between the bank and the futures company), if you want to transfer the money on the bank card, you can directly transfer it to the fund account of the futures company where you opened the account (the account you gave you when you opened the account in the futures company), and you can use the futures fund account to complete futures trading through the exchange platform. When you want to withdraw money, you must first return the funds in the futures fund account to the bank card, and you can withdraw money with the card.