2. In the jump interface, you need to click My Interface and click Login.
3. You can see the box in the interface and enter the account password to log in.
4. Select the book you want to buy, and then click Settle.
5. Select the gift card in the order confirmation interface.
6. Select the gift card, and then click OK.
7. Submit the order.
8. Enter the password to confirm.
9. The last step is to finish.