延长paypal有效期的步骤：

To update your credit card expiration date:

1. Log in to your PayPal account
2. Go to the Profile subtab
3. Click on the 'Credit Card' link in the Financial Information column
4. Choose the radio button next to the credit card you would like to
update and click 'Edit'
5. Enter your credit card verification number
6. Enter the new credit card expiration date
7. Click 'Save'

Click here to get started:

https://www.paypal.com/CREDITCARD


把新的有效期和3位的校验码输入，按SAVE即可.