What is the meaning of "dripping water" in ancient buildings?

"Drip" is a special tile at the bottom of a tile ditch formed by raised tiles on the roof of a building.

Generally, dripping water is arranged on the lower side of eaves and windowsills, and its main function is to prevent rainwater from eroding the wall along eaves and windowsills.

The Ming and Qing Dynasties gradually evolved into wishful water droplets.

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