How to harm people with needle feng shui;
You can bury the needle in front of someone else's house, which will make others lose money.
Sharp things are suffocating in themselves, which will lead to the rise of wealth. When you put them at home, you'd better not face the bedroom and bed.
Sharp things may have a bad influence on themselves, but they also have a destructive effect. If the pattern of the house is evil, you can aim sharp things in the direction of evil, so as to resolve it.
Superstition of threading the red thread:
Wearing seven stitches and one thread on the red line, called seven evil spirits, can ward off evil spirits and suppress women with larger characters, which is more popular in Sichuan.
Enough has been said about needles. It's best not to hurt people's minds, lest you hurt yourself.