According to legend, nine sons of a dragon do not become dragons, and one of them has a dragon-like head and a turtle-like shape. Dragon tortoise is known as the big tortoise of the gods, which means protecting the world from disasters and reducing disasters. It also has the meaning of longevity and auspiciousness, and the metaphor of suppressing evil and welcoming blessings. In addition to subduing Tai Sui, Sui Po, and all kinds of visible evil spirits, its power can also bring in the blessings of "positive wealth". The dragon turtle has both the power and strength of the dragon and the humiliation and femininity of the turtle. It is the best item for the evil spirit.