The shell casing has been placed under the threshold stone.

Bullets are feared by ghosts and gods and are the best evil spirits. Although it can ward off evil spirits at the door, the door is a vent, mainly to integrate the wealth into the other side and achieve the effect of a rich family. Imagine what it would be like if a polluted water flowed into parents' bodies. Compared with this principle, tolerance will kill people and hurt people who live at home.