Historical story: How did the ancients dig wells? Why do we have to release two turtles first?

There is a saying that everyone is familiar with, that is, "people who dig wells never forget to eat water." At the same time, although there is a lot of water on the earth where we live, as long as it is not desert and not too dry, there will be a lot of water, but human beings live in dense communities and have a noble lifestyle. They won't eat or drink water casually, but they must ensure that the water is clean and hygienic. Today, this is no stranger. Many mechanized projects make it more convenient to get water, and at the same time, health is well guaranteed. However, there is no comparability between ancient times and today. In ancient times, when agriculture was dominant, there was no corresponding product of the industrial revolution, so they used a clever trick in using water, taking water and ensuring the cleanliness of water. Now it may be a bit old-fashioned. That's digging wells. Modern people also dig wells, but it is relatively easy. Will it be as easy as it is now in ancient times? Let me introduce you to how ancient people dug wells. 1. Site selection: Before digging the well, choose a place with dense mugwort bushes. Before drilling a well, the well digger doesn't know how deep the groundwater is from the ground, so he relies on wormwood on the ground as a guide. But the depth of the well is usually more than three feet. 2. Digging: a tool used by the ancients to drill wells. The local language is called butterfly cone. The cone head is shaped like an icicle now, and there are two mud buckets shaped like butterfly wings on the upper part. During drilling, the cone head will also bring sediments into the mud bucket and then pull them out of the ground for cleaning. 3. Production of well radius: Well radius is generally made of larch board, and miscellaneous wood can be made without larch. The radius of the well is hexagonal, the frame is reasonable and the support is strong. Carpenters saw the selected wood into thick plates, carved mortises and tenons on both ends of the plates, commonly known as tenons and tenons, and then fixed the plates piece by piece according to mortises and tenons. 4. Downhole radius: Since most wells drilled on the plain are soil layers, the wells are deep and easy to collapse when encountering water, so the radius should be lowered when drilling wells. Where conditions permit, the surface water is shallow, and temporary wells can also be made with stones and bricks. 5. Borrowing soil: In addition, several technicians should be equipped for manual work. Under the command of the well builder, the mechanic proposed to wait until the mud in the mud bucket was full before cleaning it. At the same time, the carpenter lowered the radius of the well into the well layer by layer on the ground and then rammed it with a heavy hammer. And so on until the well comes out. In fact, drilling wells is the use of groundwater. Ancient people attached great importance to drilling wells. Before drilling a well, please ask Master Fu Feng Shui to look at the place. On the one hand, it is necessary to accurately find groundwater; On the other hand, according to the principle of geomantic omen, the well should be drilled in a safe and suitable position as far as possible. Not only that, there is a more important stress in many places, that is, after digging a well, you should put a turtle in it. Why? Point 1, test the poison. This should be the first thing that people think of, because drilling wells is used to get water and drink. However, no one knows whether the water at the bottom of the well is drinkable or toxic. After all, the ancient technology is not like now, and it can be detected by casual testing. So they choose this way to judge whether the water at the bottom of the well is drinkable. If there is no poison in the water, the tortoise is either moving or invisible. But if it is poisonous, the turtle will be poisoned after a long time, so that its body will float to the surface of the well, and people will know it at a glance. Second, pray and bless. If it is only for drug testing, it can only show that the ancients were cruel. But the fact is not only that, because many people will worry about the safety of the tortoise, so they will not sacrifice the tortoise's life to save themselves. Part of the reason is to pray! As we all know, turtles can refer to Xuanwu and water god in ancient times. So people put it at the bottom of the well, just to bless this world and make the weather good. Secondly, some people put a man and a woman, which means harmony between yin and yang. This is also the intention of peacekeeping. Although it is a bit unscientific, the five elements inside are still amazing. Point 3, longevity water. Why choose a turtle when other creatures can be released? It is because turtles are the longest-lived animals in the eyes of the ancients, and the so-called "turtle for thousands of years" means this. People want to live a long life, so they put turtles in the well, hoping that the water in the well can be drunk and make people live a long life.