2. If you spend money online, you can't spend money only with the credit card number and password.
3. When shopping with a credit card on a domestic website, you need to have the card number, security code, password, holder's name, ID number and other information of the credit card. When paying, you also need to enter the check code received by the reserved mobile phone number of the credit card to confirm that it is my transaction.
4. If you use a credit card to spend money on foreign shopping websites, you can't spend money by credit card only with the card number and password. When you use a credit card to pay for money on foreign shopping websites, you need the card number and security code of the credit card, and you can't spend money without the security code.