There is a saying of "a swift horse", so it is said that "the ambition is a thousand miles, and it is not enough"; When a horse runs, its feet are really lame, so it is said that it is "lame in an empty position"; The horse was originally used to carry people and things, so its action is acting. Therefore, "you must act before you can act"; In ancient times, wars were usually fought on horseback, and horses were very important to generals, such as Guan Yu's red rabbit horse and Xiang Yu's, so they said, "gallop around the world to show off."