The fat man told me that it wasn't long before someone started selling a kind of fine sand similar to salt, which was very expensive, and this kind of sand had no effect. But it is said to be a kind of reference sample. The fat man asked the reseller who was selling this kind of thing, and who was buying this kind of thing. I can't get a detailed answer, it's very strange, it's more mysterious than people on both ends of the business.

But the fat man still had a strong feeling: the white sand came from the same thing he had sold before. He was fascinated by the mysterious background of this thing, and he didn't think about it as much as I did back then. I feel that it is better to die than to live without figuring out my life.

In the end, the only conclusive clue he got was that he was told that the sand was for comparison.

Someone is looking for the desert where these white sands used to be. The comparison of the composition of the white sand sample with the sand in the desert is the only clue.

"Is this sand of any special use?" I asked, "Is there some kind of divine power in this white sand that can be used to dispose of that kind of corpse?"

"No, this white sand is just a filler. Very ordinary, the fighting corpse sounds hanging, at best a mummified treatment. But the first people to possess this technology came from that desert, and later people distorted a lot of information through ancient books, and have always believed that the white sand from that desert was a key factor. So I've been mining sand in the desert over there. Sand doesn't really matter. The fat man said: "You must not guess which era the ancient books that record these things are." ”

I looked at the fat man and nodded to him to say quickly, and the fat man said, "Pre-Qin period." ”

It was an era of alchemists, and I was not surprised by such scientific achievements, the fat man continued, "Ancient books come from that desert. It has to do with a special civilization. ”