What's the difference between hotel reservation and group purchase in E Long?

The group purchase price will be more favorable than the normal booking price, and so will the room type. However, the group purchase hotel requires you to contact the merchant to make a reservation after purchasing and paying. If the merchant can provide a room on the date you need, you can stay. If the merchant can't provide it, he can only choose another date to check in or leave the group. Normal reservation means that after receiving the confirmation information, you can check into the room on the date you booked, and the price is the normal reservation price.