Huizhou, Anhui Province, is a place where Huimo is a specialty. At that time, residents would put several turtles in their drainage pipes as scavengers. At that time, the sewer system was to discharge dirty water and sewage from the village. Because in ancient times, people paid more attention to gathering wealth, and when laying sewers, they were also tortuous, and they did not go straight outside the house, but they paid attention to feng shui jewelry and the like.
Extended data:
In ancient Huizhou, Anhui Province, due to the bending of the sewer pipe, some sludge will not directly flow into the sludge pool for storing sludge. At this time, put a turtle, because the turtle prefers this dark and humid place, and it will climb inside with mud, thus acting as a "scavenger" of the sewer.
If you raise fish well, you can change water; if you raise fish badly, you have to change fish. Because fish is delicate, if the water temperature and quality are not suitable, it is likely to die. As the saying goes, a turtle of 1000 and 80000 years old is a relatively tolerant animal. In ancient times, some people even put turtles in sewers as scavengers.