First read the instructions on the web page. For example, if you need to call the merchant one day in advance to make an appointment, you should call the store the day before you go to say what you bought online and make an appointment to use it tomorrow. Then note that there is a date limit on the instructions. Do you not accept group buying on the day you want to go? When these are ready, you just go to the store with the group purchase coupon code (some of which are account passwords). Say it's a group purchase at the front desk, and he will ask you to register the code on paper, and that's all.

Please accept it if you are satisfied.