Ninth Prince of the Cold Palace, I Am Building Artillery in the Fiefdom

When Shen Yan, a doctor of engineering, opened his eyes, he became the ninth prince waiting for death in the cold palace of the Yu Dynasty - a bowl of poison was poured into his mouth. He backhandedly uncovered the poison bureau, uncovered the poisoned eunuch, and dug out an old money-laundering account from his mother-in-law's old scriptures that could drag the fourth prince into trouble. Others asked for favor or life, but he only asked for the same thing: to go to the poorest, most desolate and barren state where bandits were everywhere and become a vassal. The city wall can fit into a fist, the treasury can outrun a mouse, the army has three thousand soldiers, and there are only a few hundred thin soldiers left in the school field. The whole city was waiting to see this joke about the deposed king. But they don't know—— Soap and salt are money, cement brick kilns are cities, and coal and iron blast furnaces are knives. And this gunpowder, which no one in the world has ever seen, is only in his hand. This king is guarding this city. From a piece of soap to the first artillery piece, the deposed prince wants to turn this barren state that is rotten to the core into an industrial power that Beidi, the grassland, and the world can look up to.