If you want to book a hotel room for seven days, can you book one more day online?

Yes, but please note: 1. The first night you booked it online, so you can only enjoy the online price, which may be different from the counter price. You can try to get the counter to give you the online price. The counter doesn't agree to give you the online price. You can extend your stay, but you can only enjoy the counter price, otherwise you won't extend your stay. 3. If the hotel is fully booked the next day and the network closes the room, you can't stay the day before yesterday, so you can only find other hotels. I hope I can help you! Hope to adopt!