Cows in literature were usually depicted as strong, powerful, hardworking, and loyal animals. In ancient Chinese literature, the ox was a common image, often used as a symbol of labor and tenacity. For example,"Dream of the Red Chamber" wrote,"How can an ignorant and incompetent cow be worthy of talking to humans?" In addition, cows were often used as a metaphor for loyalty and keeping promises. For example," A loyal minister and filial son are not as good as a cow or a horse." In contemporary literature, the image of a cow often appeared in poems and novels to express vitality and tenacity. For example," The Yellow River shore has an ox's neck, but the water is firm and unyielding."