Chapter 102
— Sima Yi Occupies The Banks Of River Wei; Zhuge Liang Constructs Mechanical Bullocks And Horses.
He and Du Rui are the two leaders Zhuge Liang whispers secret orders to and then puts in charge of the thousand craftspeople sealed inside the Gourd Valley to build the wooden oxen and running horses — with Ma Dai on the mouth of the valley to stop anyone going in or out, and Zhuge Liang himself visiting at irregular intervals: 'A plan for the defeat of Sima Yi is being prepared here and must be kept a profound secret.'