1.Log in to cowminer.com and complete user registration via email.
2.Click CDkey Redemption on the top navigation bar of the official website, and enter the
   CDkey on the back of the gift card and your Amazon order number in the second step.
3.Confirm the product details, the system prompts you to choose to exchange the product,
   enter the order into "My Warehouse", select the order to be picked up, confirm the delivery
   address and pick up the goods, and the confirmation machine will send out as soon as possible.
4.You can also choose to exchange the order amount into an equivalent cowminer account balance,
   and use the account balance to purchase any product on the website.
5.Waiting for delivery.