Yam is a kind of rhizome vegetable that we often eat, also known as dioscorea, potato, etc. Chinese yam is both food and medicine. It is not only a good vegetable to eat, but also a tonic medicine. There has always been a folk saying that "white Chinese yam is better than ginseng". In some parts of China, yam is also called "the food of immortals".

Angelica is a perennial herb that grows in cold and rainy areas. It is the root of the umbelliferae Angelica. It is a traditional Chinese medicinal material that nourishes blood and activates blood. In daily life, it has a good therapeutic effect on women with cold hands and feet and cold palace.