The card coupon envelope will be labeled, such as 898 type, 998 type, 1298 type, etc. If the card envelope is not, in the lower left corner of the front of the card or the back of the card will be labeled. You can also scan the code to view it later, in the official small program platform, enter the card coupon number and password, you can see the price as well as the specifications of the crabs that can be redeemed.