as medicine, but this kind of stone, called fire saltpeter!""Fire powder" Liao Hongying asked curiously, "What can fire powder be used for"Of course…Firepower is of course used to make gunpowder!But...e of "low-profile development" and "quietly accumulating wealth."After taking care of that, Yang Lin immediately returned to the village.Having just ordered the execution of Liu Chong and his men, it...