Lin Heng traveled to the first year of Zhenguan and activated the prosperous auxiliary country system.
He originally wanted to make some small inventions to improve his life, but unexpectedly, the system asked him to solve the Weishui Alliance crisis at the beginning.
He took out the blast furnace steel-making method with his backhand: "Your Majesty, how about using this to fight the Turks?"
When horseshoes, gunpowder, and gewuyuan were invented one after another, and when the Turkic Khan knelt down to offer his surrender, Lin Heng discovered——
The way Li Shimin looked at him seemed something was wrong...
