Li Yan, a doctor in the military industry, accidentally traveled through time and became Xiao Jingyan, the deposed prince of Dayin who was imprisoned and assassinated. He used his knowledge of chemistry to see through the poisonous scheme, used local methods to make gunpowder and narrowly escaped death, and went to the barren Yancheng to open up wasteland and build a foundation. Improve farm tools, forge firearms, train strong soldiers, defeat Di, fight against the prince, overcome the emperor's suspicion, become a prisoner in desperate situation, and build an empire legend step by step!
