"The king of Chu has a thin waist, and the maids starve to death." It shows that the king of Chu prefers women with thin waist, and in the Song Dynasty, when the wind of losing weight prevailed, the secret recipe of losing weight for empresses was endless. Among them, unofficial history was favored by harem concubines in Song Dynasty because of its slim figure, and it has been recorded a lot and has become a classic.

According to the secret history, there was a concubine in the Song Dynasty who was as light as a swallow and was deeply loved by saints. With the length of time spent in the palace, concubines are more spoiled, their bodies are out of shape and obese, and harem beauties come forth in large numbers and gradually fall out of favor. In order to win your heart and honor your grace, the princess asked the imperial doctors to study the prescription of slimming medicine quickly. After careful adjustment and slow research, the imperial doctors came up with a secret recipe for soaking feet with Chinese medicine. After more than 20 days, Yu Ji looked elegant and graceful, and her charm was not as good as that of that year. Later, she really regained her favor and became a secret classic of the deep palace. This secret recipe of soaking feet and slimming is more important for future generations. After several generations, the secret recipe was almost lost. Later, I learned from an ancient book that after modern medical improvement, I took its essence and removed its dross, especially "losing weight without losing weight, losing meat without losing chest", which can be called a classic of health preservation and slimming, and the secret recipe of Chinese medicine soaking feet became famous in one fell swoop.