Old Two: "Elder, I can't come here for nothing. You order me some first, alright Let's order some for both our families. When I get back, I'll ask around. We have a few hundred households there. Even if we don't use it for building houses, we all need kang beds. You see, the more we order, the cheaper it can be, right",Someone asked, "Yan Er, are there still many stones like this in the quarry",He pulled out another thin slate and showed it to everyone: "There are also these kinds. The foreman at the quarry said that these slates can be used for heating floors."。