Customers can present 1-plus-2 Coupon within the validity period at the time of payment. Of course, this 1-plus-2 order will only work when it meets the usage scope and rules of 1-plus-2 Promo Code. During the payment process, 1-plus-2 provides a place where 1-plus-2 Coupon Code can be detected, and it can be applied to the payment according to the instructions.