angyang first glanced at his dead servant, then coldly looked at the Jinyiwei thousand household who had done it.But like Li Chen, he was utterly disdainful of speaking to servants.He called out to Li... he heard the words "saltpeter mine," So An Tu curled his lip in disdain, thinking that the Prince of Qin was being overly ambitious.Everyone knows that saltpeter is used to make gunpowder.Formerly, g...