In Chapter 102 of Romance of the Three Kingdoms, Zhuge Liang described how to make wooden cows and flowing horses. Suddenly, Yang Yi, a long history, reported: "Today's grain and rice are in Jiange, which is inconvenient to carry. What can we do? " Kong Mingxiao said, "I have planned it for a long time. It is very convenient for people to make wooden cattle and horses with building blocks and big wood bought by surprise, and carry grain and rice. Cattle and horses don't eat water and can be transported day and night. " Everyone was surprised and said, "I have never heard of such a thing since ancient times." I wonder if the Prime Minister has any clever ways to make this wonder? " Zhuge Liang said: "I have made it according to law, but I haven't finished it yet." I'm going to be a wooden cow first. The size is Fiona Fang, and the length is wide and narrow. I'll make it clear. You can see that. " Everyone is very happy. Then it introduces the manufacturing method of wooden cow: square belly and curved head, one foot and four feet; The head is in the collar and the tongue is in the abdomen. ..... Each cow carries food for ten people in January. If people don't work hard, cows won't eat. How to make a floating horse: the ribs are three feet five inches long, three inches wide and two inches two minutes thick ... After reading them, the generals all bowed down and said, "The Prime Minister is really a god!" When Sima Yi heard about it, he sent someone to grab a few wooden cows and horses, took them apart, drew sketches and imitated them. In less than half a month, we actually made more than 1000 horses. Once used, it is as good as that made by the Shu army. So, Wei Jun also used them to transport grain and grass in Shaanxi, thinking that he had a plan and "kept going back and forth". Don't you know that this is exactly Zhuge Liang's plan?