There is an analogy between the way water moves in waves and the way light travels.

流动的方式与光的传播方式有相似之处。

Bronze Drums are often engraved by symbols of sun, flying man, aigrette, water wave, circle, and elephant eyes.Statues of frogs or ducks are used for decoration.

铜鼓上面刻有太阳、羽人、鹭、、圆圈、眼等，还有蛙、鸭等立体雕。