What is called a thorn surface evil spirit

If the appearance of the house or out of the window, is at an eventful hills or slope, like a sword stab residential facade, called the "thorn evil spirit".

Make face evil spirit house, vulnerable to a thief stealing or looting, or family is illegal.

Dissolve the surface evil spirit, can be in the face of ShaQi hang two bunch of Ming zhou gourd or copper elephants.