What are the corners in the building?

First, Feng Shui actually said that the corner of China's ancient buildings was called Jiaosha;

Second, the specific explanation:

It means that the corner of the eaves of the building at the gate or outside the window is trumpet-shaped and rushes in the direction of home and gate, which is called "corner evil spirit". You can use the "call to drink elephant" in Feng Shui to hang a morning glory copper ring or red cloth on the wall next to the direction of committing this evil, with the intention of dispersing a corner.