子牛——春秋时孔子的门生司马耕以“牛”自喻，立志自己要像老牛那样不辞艰辛、勤于劳作、躬耕而有所得，就将名字改为“子牛”。后来他也真正成了孔子的得意门生，学有建树。病牛——宋代高宗时李纲曾做《病牛》诗：“耕犁千亩实千箱，力尽筋疲谁复伤?但得众生皆得饱，不辞羸 Sub-Cattle - Confucius’ doorman Sima Geng self-represented himself in the Spring and Autumn Period and determined that he would like to be hard-working, diligent, and ploughing like the old cow. He would change his name to “children.” Later, he also became a proud student of Confucius, and he has made achievements. Diseased cows - Li Gang, a senior scholar of the Song Dynasty, wrote “Disease cows” poem: "Till 1000 kilos of plowing ploughs, who are tired and tired? But they get full of all beings.