Do I need a membership card to book a hotel online? Is it impossible without a membership card?

It depends on the type of membership card. Generally, you have to apply for the relevant card first, and then use the discount. Booking hotels online requires registered members, such as Jinjiang Star Blue Whale membership card, Hanting Hotel All-season Gold membership card, Metropolitan Hotel Platinum membership card 1 18, etc. Generally, you need to show your ID card when you go to the hotel front desk to apply for a membership card, and you need your ID number and email address for online registration.