According to Feng Shui, midnight, that is, midnight 1 1 to morning 1, is the most haunted time. In fact, ghosts belong to the soul body, have no entity, and can enter directly through the wall. Generally speaking, the ghost knocking at the door is black and white impermanence, and impermanence comes to the door, which is to catch the soul. Extended data:
Precautions for knocking at the door In daily life, knocking at the door should be bent with the index finger or middle finger of the right hand, and knocking twice when knocking at the door indicates that the two sides are close; Knock three times to ask, if anyone is there, can I come in, etc. It is impolite to knock four times or too hard. If there is no response after knocking at the door, you can knock three times at intervals, and you can't knock on the door continuously and hurriedly.
The following contents are for reference only: Baidu Encyclopedia-Knocking at the door