After digging a well, ancient people often released turtles in. Knowing the reason, everyone admired it.

After digging a well, the ancients would put two turtles in it. This action seems strange, but when we know the reason, we will admire their intelligence.

Because there was no modern equipment to provide water, digging wells would help ancient people store and find water sources for daily life and activities.

Well is a place to store water for the family (Source: Sohu)

Why put turtles in the well?

First reason, turtles can detect water quality. Turtles have quite high requirements for water quality, if the water quality is poor then the turtle cannot survive.

Furthermore, the ancients did not have modern tools and equipment to test the quality of water sources like today. Therefore, they would not have been able to detect whether underground water contained toxic substances or not.

At this time the turtle was released, a few days later the turtle was still alive proving that the water in the well was safe to use.

Turtles have relatively high water quality requirements, poor water quality will kill turtles. (Source: Sohu)

Additionally, this is to protect people in case someone puts dangerous substances down the well.

Finally, turtles are a symbol of longevity and luck. Ancient people released turtles in wells with the wish that their families would always have good luck and live long.

Thu Hien (Source: Sohu)

Useful
Emotion
Creative
Unique
Wrath

Source: https://vtc.vn/dao-gieng-xong-nguoi-xua-thuong-tha-rua-vao-biet-duoc-ly-do-ai-cung-kham-phuc-ar810302.html