Because, China people especially like turtles, because turtles have a very long life span and can witness the rise and fall of the world for hundreds of years. Since ancient times, they have been regarded as a symbol of longevity and good luck.
The main functions of raising turtles are:
1, keeping turtles can ward off evil spirits.
2. Use tortoise shells to block evil spirits.
3, strengthen firepower, drive away evil spirits, and prevent people from falling.
4. Improve the air quality at home. Grass turtles walking around the house basically don't need to be fed, because they absorb microorganisms in the air, so turtles have a long life. Keeping a turtle at home and letting it suck microbes is also one of the ways to improve home feng shui.