This is a story about Zhuge Liang. One day, Zhou Yu asked Zhuge Liang to make 100,000 arrows(箭) in ten days. Zhuge Liang said: "Three days is enough." Then he borrowed some boats and soldiers from Lu Su. But he didn't do anything on the first day and the second day.
On the third day, it was foggy(有雾的) in the daybreak. Zhuge Liang sent out the boats and
soldiers to Cao Cao's camp. They played the drums and shouted. Cao Cao couldn't see things clearly on the river. He asked his soldiers to shoot. After a while, Zhuge Liang went back with the boats full of arrows.