How did the grave robbers find the grave?

Feng shui has some doorways! Graves are usually buried in the wilderness. Look at the places where there are no grass and trees in the wasteland. Most of them have graves below! And they also know some history, so that they can find out the approximate location of the cemetery! After finding the approximate location, use Luoyang shovel to locate it accurately! This is the most critical! Luoyang shovel is the simplest, most traditional and best tool for grave robbery! Regular archaeological teams are using it! I don't know exactly, but I also watched it on TV! If you watch more TV dramas about tomb raiding, I believe you will know something!