How to use discount coupons

How to use discount coupons ?
First you go to your account and click "my coupons",you will see you all coupons .Make sure the the coupon has not expired (most will show the expiry date). During the check out process , You can enter the full promotion code and click "Apply ".
You can only use one coupon code per order. A coupon can only be used to cover the value of goods, they cannot be used to discount shipping fees.
If I place repeat order ,can I cancel one of the two order ?
Please contact our Customer Service Department: in the first way and tell us the two order number ,so that we can cancel your one of the order and resolve your problems as soon as possible .