Guan Yu nodded and said, "Yes, this beef is a very common food. There are too many things you haven't seen. For example, this bag containing beef, have you seen it?" This thing can only be produced by machine. It is impossible for man or hand to make it.

Guan Yu took the bag and showed it to the devil. The devil took it over and looked at it for a while. Then he asked, "What is the material of this bag? How can I not see it? It's not cloth, it's not paper, it's not iron, what is it?

"Oh, yeah, you're not talking about it. This bag is...