For example, this happened before the Western Han Dynasty and during the Yuan and Ming Dynasties. There are also some records in unofficial history, which show that most craftsmen will be killed. In a word, the craftsmen who built the mausoleum seem to have no good end. But in fact, through your careful study of historical materials, you will find that these ancient craftsmen also came out alive from the graves. They left a back road for themselves before the tomb door was closed, which led them not to be buried with the emperor.
After designing the imperial tomb, they will design a special hidden organ at the last entrance of the underground palace. When making a stone gate, craftsmen will leave a thin seam on the door to place a kind of stone gate called? Turn the key? Tools. This tool can resist the stone bar from passing through the gap behind the door. When the tomb is finally sealed, they will put down one stone gate first and then use the other. Lever principle? When people stand outside the stone gate, they can hold the upper end of the stone bar inside so that it cannot slide. ?
In the process of loosening and tilting the stone strip, the stone strip will keep falling until the stone strip completely resists the stone gate, and the tomb sealing work is truly completed. It is because of this little trick that the last craftsman successfully saved his life. The wisdom of the ancients is really great.
However, the disadvantages of this design are also obvious. Although it saved the lives of masons, it also gave those grave robbers some opportunities. It is precisely because of this design that many grave robbers can use the same principle to open the stone gate again as long as they master the skills. Considering this layer, the craftsman creatively invented the one-time sealing technology. Generally speaking, as long as the stone gate is closed from the outside, it is difficult to open it again, but these designs did not stop grave robbers, who opened it by such barbaric means as explosives anyway.