Knives and scissors should not be pointed at others. Anyone who has studied etiquette will know this little common sense. When passing small scissors, don't point sharp points at others and be rude to others. A person's words and deeds are very important, if you usually pay attention to these details. You must have good interpersonal relationships.
Don't put the knives and scissors in the north, west and east.
Putting knives and scissors at home in these directions obviously violates Huang Wu, Erhei and Sifeixing. Not conducive to health and wealth. Especially friends who commit tai sui have worse luck, poor health and tense interpersonal relationships.