I Was Engaged in Industry in the Late Han Dynasty

I was like the leader of a small pavilion in the late Han Dynasty. The wall collapsed, the food was gone, and the yellow turban thieves will arrive tomorrow. There is no system, no grandpa, I only have a half-baked knowledge of chemistry. They asked: Can cement block knives? I said yes. They asked: Can iron be made in an earthen kiln? I said yes. Three months later Ding Yuan wanted my soldiers, and one year later the whole world wanted my life. They asked me why - Just these hands.