Bushen Quhan is the most important tonic in winter, and winter is the best season to eat mutton. In winter, the yang of the human body is hidden in the body, which makes it easy to have cold hands and feet and poor blood circulation. Chinese medicine believes that mutton is sweet but not greasy, warm but not dry, and has the effects of warming the middle warmer, dispelling cold, warming qi and blood, tonifying kidney and strengthening yang, stimulating appetite and strengthening spleen. Therefore, eating mutton in winter can both keep out the cold and nourish the body, which can be described as killing two birds with one stone.