Is cinnabar wine spilled outside or inside the door?

Cinnabar mixed with wine was thrown at the door to ward off evil spirits and kill ghosts.

Clean house literally means to get rid of unclean things at home, which is a superstitious statement. Cleaning the house is a folk belief and custom. Many old people know this sentence. If there are people in the family who can't afford to stay ill for a long time, it is not good to seek medical advice everywhere. Old people think that there must be "unclean" things, so they need to ask special people to help clean the house and get rid of the unclean things in the house. Generally speaking, the purpose of clean room is to ward off evil spirits, which can be achieved through appropriate methods.