You have to knock three times to get in. Do you know why?

Knocking on the door represents temptation, indicating that the knocker is a stranger; Knocking twice means waiting for the other party to reply, indicating that the knocker knows himself; Knocking three times means asking, which means "hello?" ?

Knocking on the door is a sign of respecting the privacy and space of others. As an adult, we should start with "I" and set an example. Let children learn Chinese etiquette imperceptibly in daily life.

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Zazie Hoko

Knock on the door at a moderate volume. If it's too light, others can't hear it. If the noise is too loud, others will resent it. When knocking at the door, don't punch, kick or bang. If there are old people in the room, they will be frightened.

If someone else's door is unlocked, you should also knock at the door first and get the owner's permission before entering. When you enter someone's office, you should also knock on the door, indicating a kind of inquiry "May I come in" or a kind of notice "I am coming in".

Most modern families have installed doorbell. When you ring the doorbell, you should be polite, ring it slowly and ring it again every once in a while. Don't be impatient, just ring the bell, or the doorbell will break.