Mysteries About Ancient Tombs

My third uncle brought out an ordinary bead from an ancient tomb. I didn't take it seriously at first, but later when I was a soldier, I went on a geological survey mission. During the mission, the survey team accidentally entered a large tomb of the Liao Dynasty. In the tomb, the survey team encountered some terrifying and incomprehensible strange things, which caused huge losses. I also got a bead in the tomb that was exactly the same as the third uncle's. I really couldn't figure out why there were the same bead in two ancient tombs from different periods thousands of miles apart, and some weird and bizarre events happened in both. In order to seek the truth, after I retired from the army, my comrade Er Maoleng and I started a difficult and terrifying journey of exploration.