Promo Codes is used as follows: You can view your existing Starr Restaurants Promo Codes by logging into your account, viewing your profile and clicking [My Card]. If the product you want to buy complies with the Promo Codes rules of use, then you can add the product to your cart. Then, click the Calculate button, and finally jump to the payment page, you will see the information of [Select your Coupon Codes], click to select the Coupons you want to use, and then return to the payment page to continue to complete the payment. Please note that used Coupons will be automatically removed from your coupon.