There is no charge for online registration of Wowotuan. The fees you mentioned above probably refer to online fees and the like. If you want to buy a group meal coupon, you must first register your account, then search for local food, and finally pay by online banking or Alipay. After success, there will usually be SMS reminders, and then you can eat with SMS or printed group purchase coupons. Note that general merchants need to make an appointment in advance.