1. Log in to JD.COM Mall official website or the client, use JD.COM account, find the "My E Card" option in the personal center, and activate it. Follow the prompts to complete the activation process.

2. When purchasing goods, choose to use JD.COM E card to pay. On the settlement page, select "Use Coupon/Balance" and select the corresponding JD.COM E card for payment. The system will automatically deduct the corresponding amount to complete the payment.

3. Enter the personal center and search for information about "e-card balance" under "e-card management" or similar options; Or enter the corresponding e-ticket number through the webpage to inquire about the remaining amount of the current e-ticket.