Tonic in winter, tiger in spring. Winter is a good season for tonic. Winter is cold, so it is advisable to eat soft heat to treat its cold. It means that the winter diet should be warm and soft, and eat less sticky and cold food. In terms of ingredients, it is a good choice to give priority to "tonifying kidney essence", nourishing yin and suppressing yang, and foods with high calories. Mutton, venison, goose, pigeon, beef kidney, soft-shelled turtle, tortoise and sea cucumber can be used to nourish essence and warm yang, which is a good tonic in winter. Soybeans, walnuts and chestnuts can warm kidney yang, and auricularia, sesame, sweet potato, carrot and peony are all suitable foods in winter. Winter is also a good season for people with weak constitution to nourish with traditional Chinese medicine ointment. Because people are old, weak, young and strong, and their constitutions are different from those of cold and heat, the prescription of traditional Chinese medicine ointment needs to be adjusted according to individual actual conditions, and the method of tonifying kidney and replenishing essence should not be blindly adopted. If possible, you can find an experienced Chinese medicine practitioner to prescribe and regulate it.