What's the situation with the yellow symbol in jinshanwei Hotel?

It is used to ward off evil spirits and has no effect on guests. For places with large mobility, northerners are used to putting a sign on them when they are bored and cold to drive unclean things into the room.

In general, it is difficult to see hotel rooms in the south. So from this point, it can be explained that there are still obvious differences and differences between the north and the south. Different cultural levels have created many things that exist in different points. Sticking cloth in the hotel room is just to ward off evil spirits and get rid of unclean things. Popularity means superstition.