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Shadow Wall (y ǐ ng b ì qi á ng), a wall decorated with various reliefs. The wall facing the gate as a barrier and decoration, some have seats underneath that can be moved, and the top looks like a ridge. Shadow wall, also known as screen wall, ancient called Xiao wall, modern also known as shadow wall, is a wall used in traditional Chinese architecture to block the line of sight.
In the past, people believed that ghosts would constantly visit their homes. If it is the soul of one's own ancestors returning home, it is allowed, but if it is a lonely and wild ghost sneaking into the house, it will bring disaster to oneself. If there is a shadow wall, ghosts will be scared away when they see their own shadow. Of course, the shadow wall also has its functional role, which is to block the view of outsiders, even if the door is open, outsiders cannot see inside the house. Shadow walls can also enhance the atmosphere and increase the momentum of residential buildings.