people of Liao who are tall and strong with an average height of 1.8 meters.Even these high-ranking officials from the East Asian countries, whose dietary nutrition should be impeccable, looked like... "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, gunpowder played a r...