Does the Tourism Law say that tourists are required to pay the room price difference?

Some people live in a standard room, that is, a double room, which means that the room rate you pay is actually half, and the person who lives with you will help you share the half. If there is a single person, he has to pay the other half, so he lives in a room alone. This is called making up the room difference. The general solution is to find someone to share the room with you, and you don't need to make up the difference.