May I ask the origin and significance of the eaves of this ancient building?

The previous building is generally used lime or clay and grass mixed as a coagulant, and more rain in the south, this building can not withstand the wind and rain for a long time, blocking the rain is one of the reasons; in the eaves of the wall protruding place is often similar to the carp head and the dragon tail decorations, that is one of the dragon's nine sons (I forget the specific name), which like to ascend to see the distance, which means that people living in this house will have a great success; and there are also The beauty of the house is modeled after the style of the ancient palace buildings, which are arranged in a row, representing the perfection of the day.

What the upstairs said refers to the patio, not the wall eaves!