Hairy crab gift certificate, also known as crab coupon, is an online shopping voucher, which can be used to exchange hairy crabs on the Internet or in designated stores. The way to use crab coupons is to buy them in advance. You can buy them before the hairy crabs are listed, and use them to exchange crabs after the hairy crabs are listed. Crab coupons have become a gift-giving choice. The hairy crab gift certificate sent by Tmall is provided by Tmall platform and sold through legal and compliant channels. As the official gift certificate of Tmall, it is true and effective, and can be exchanged for hairy crabs at designated places.