What do you mean by room difference and room difference?

The difference between a single room and a make-up room is actually the same meaning, because the accommodation during the tour is generally a standard room, that is, two beds. If your number of tourists (adults) is odd, you may need to pay for an extra bed or choose a triple room. You can also choose to buy a house with others, but we generally don't recommend that guests buy a house with others when they travel individually, so as to avoid disputes due to economic losses. When you can't spell a house, you need to make up the difference between single rooms.