First, confirm whether you have an account in NewAir. If not, you can create it first. Then select your favorite NewAir product and add it to the shopping cart. Click the calculated button, and finally, jump to the NewAir payment page. After clicking, you can select the NewAir Coupon Codes you need to use, and then return to the payment page to continue the payment. It should be noted that the used NewAir Coupons will be automatically removed from your Promo Codes.