How does the slate in Longling Cave get in the way?

The slate of Longling Cave blocked the way of Shang Dynasty tombs. Oni Tsuka khufu, fat, big gold teeth, three people went in to find the tomb of Tang, and three people led two big white geese into the tomb. Triggered the Shang Dynasty tomb sacrifice, and then they killed a goose. One was sucked dry by a spider. Hu Bayi three people walked all the way, very tired, and later found a family, decided to rest and get something to eat, but found a slate of the early Western Zhou Dynasty in the hut in the backyard, which shows that there are tombs of the Western Zhou Dynasty nearby. The head of the household said that a professor in Beijing once said that this slate was a good thing, but when it was good, it could not be used as food, so it was used to pad the toilet. So the tomb of the ghost disappeared, and the slate in Longling cave came from the ancient tomb of Shang Dynasty.