Because you can use inferior raw materials. Generation of processing things, look at its production process, we know, glue are powdered after boiling, why he has to powder it, is that there are a lot of Colla Corii Asini block, he actually does not powder, it is boiled not melt. Because it is inside the added things, or you can just say it is not authentic faster, he can not boil, so he can only powder Oh, first of all, he is powdered, why did he go to powder it, because fast, save things.