This is an interesting story from the Three Kingdoms period (220-280) in ancient China, when the Wei and Wu kingdoms joined together to fight against the Wei Kingdom. Zhou Yu, the chief military commander of the Wu Kingdom, ordered Zhu Ge Liang (the chief minister of the Shu Kingdom and generally regarded as the kingdom's top master-mind) to produce 100,000 arrows within 10 days.
"Three days is enough, " said Zhu. He also agreed to be punished if he failed to complete the order.
Zhou mocked that Zhu was looking for self-destruction. On the one hand, Zhou ordered his troops not to provide Zhu with materials to make the arrows. He also sent Lu Su to see how Zhu was dealing the problem.
In fact, Zhu had already realized that this was a plot. He asked Lu (who was kind-hearted) to lend him 20 boats, each lined with straw scarecrows and manned by 30 soldiers. He also requested that Lu not tell Zhou what was happening.
When Lu came again to see Zhu, he did not find anything unusual. Nothing happened on the second day either. In the early morning of the third day, Zhu invited Lu for a boat ride. The 20 boats were tied together with strong ropes. Zhu's fleet sailed toward the camp of Cao Cao (who was the king of the Wei Kingdom).