Romance of the Three Kingdoms S01 E23 Episode 23 The Arrow Borrowing

Zhou Yu deliberately proposes to make 100,000 arrows in ten days. The wise Zhuge Liang recognizes at once that it is a harmful scheme, but calmly says "it only takes three days". Later, with the help of a foggy day, Zhuge Liang takes advantage of Cao Cao's suspicious nature and transfers several straw boats to lure the enemy, finally borrowing 100,000 arrows and achieving a miraculous success.