According to Wang, one line in Zhuge Liang's "Making the Wooden Ox" -- "Where the head joins the neck, the tongue connects to the abdomen" --is explained by the tongue being the mechanism that controls the legs.
王湔表示，諸葛亮在「做木牛流馬法」裡，講到「頭入領中，舌著於腹」，為什麼舌頭要與腹部相連？就是因為舌頭是控制四隻腳的機關。