The male science and engineering spirit is Liu Bei, who can only weave straw sandals at the beginning. Others rely on bravery to achieve hegemony, but he relies on technology to defy the odds! Improved spirits, refined salt, blast furnace iron smelting, and cement city construction all developed step by step. During the decisive battle in the Central Plains, a horse-drawn iron-shell chariot emerged from the sky. Cao Cao was confused: "Xuande, what is this thing?" Liu Bei smiled lightly: "Prime Minister, they said it is called a tank."
