Three Kingdoms: I, the Carpenter, Make a Repeating Crossbow at the Beginning

He fainted from hunger in the dead forest and woke up as a refugee from the Eastern Han Dynasty. He whittled a piece of wood to make a crossbow, and shot an arrow through three inches of tree bark. Guan Yu, who was passing by, reined in his horse and stopped: "Sell me this bow." I raised my head and looked at the sky: "There's going to be a war, I'll make something more ruthless."