Zhao Tieshan, a modern metallurgical engineer, woke up and became an apprentice in the blacksmith shop during the Daoguang period of the late Qing Dynasty. He has skills in his hands and knowledge in his mind, but before his eyes are the smoke of opium, the powerful ships and cannons of the great powers, and the decay and incompetence of the imperial court. He started with a kitchen knife - his carburizing skills made officials look at him, and his iron casting skills amazed foreigners. Build an iron factory, make muskets, refine steel, and cast cannons. From an apprentice in an iron shop to a prince with a heavy army. In the Opium War, he used native artillery to repel the British army, in the troubled days of the Taiping Rebellion, he protected the common people, in the Westernization Movement he competed with Li Hongzhang, and in the Sino-Japanese War of 1894, he used ironclad ships to fight against the Japanese combined fleet. He built steam engines, trains, telegraphs, and generators, and developed a blacksmith shop into an industrial empire covering steel, arms, chemicals, and electricity. From 1840 to 1911, it was seventy years of ups and downs. He used an anvil and a hammer to forge the backbone of a nation hammer by hammer.