After all, things handed down for thousands of years. It is the experience summed up by predecessors.

As for releasing villains, according to local customs, it should be the effect of exorcising evil spirits and calming dreams. Just like some places will put red ropes, amulets and other mascots in pillows.

As for more, you can go to some high-end Zhouyi math forums to ask. There should be a more scientific explanation.

Li Xinyang 369