Dragons are very powerful creatures in Chinese culture, and they have a special collocation in Feng Shui too. Dragons, in the right places, can make energy flow and bring prosperity. The dragon that has his own tail in his mouth symbolizes also the circle of life and eternity.
Requested by Marco.
A curiosity: the nine-shaped nostril of this design was made on purpose. Nine, a lucky number, is often associated to dragons, and placing the number nine on the dragon´s body will bring good luck.