Open JD.COM App, click "My" in the lower right corner and find "Coupon".
After entering the page, you can see the coupons you received before, and each coupon has a time range. Which one do you want to use? Click on the coupon to enter the product page and buy it now.
Coupons can't be used when they expire. You can try to find it on some coupon-collecting apps and get it again, as long as it is downloaded from the software store of your mobile phone.
The link to send this product can be found in the previously downloaded application.
The advantage of this: after receiving the coupon, you can place an order again. When paying, the system will directly subtract the denomination of the coupon.
Note: not all products have coupons, and the coupons received will expire. It is recommended to use it as soon as possible after receiving it.