According to the Ruichang County Records during the Longqing period of the Ming Dynasty, yam (nagaimo) was one of the important products and medicinal herbs of Ruichang at that time, with more than 500 years of cultivation history, and its tubers are rich in starch, sugar, protein, vitamins, amino acids, and other nutrients, with strong health of the spleen, kidney, and lungs of the function of the preparations, is a kind of both vegetables, medicinal dual-purpose top quality products. Ruichang yam applicability, good productivity, storage and transportation, long cooking not paste, unique flavor. Ruichang yam and field yam appearance is a clear difference, Ruichang yam skin is not smooth, and root hair more; field yam smooth and straight, root hair sparse, a look. Only the authentic Ruichang yam produced in Ruichang City, Jiangxi Province, the flavor is authentic, as the so-called "orange born in Huainan is orange, born in Huabei is Hovenia," is the truth.

"Yam", also known as yam, yam, applesauce. Yam is a nourishing delicacy, fried, popped, slip, soup and other cooking methods can be. Yam is one of the constituent medicines of the Six-flavored Dihuang Pill. 1. Nutritionally rich, containing a variety of essential nutrients.

2. It can supply the human body with a large amount of mucin, which is a mixture of polysaccharide proteins and has a special protective effect on the human body, which can prevent fat deposition in the cardiovascular system, maintain the elasticity of the arterial blood vessels, and prevent atherosclerosis from occurring prematurely.

3. The mucus polysaccharides of yam, if combined with inorganic salts, can form bone and give cartilage some elasticity.

4. Chinese medicine believes that yam has the effect of nourishing the spleen and stomach, tonifying the lungs and benefiting the kidneys, and is effective in treating coughing and wheezing in the lungs, prolonged diarrhea in the spleen, chronic gastroenteritis, diabetes, spermatorrhea, and other conditions.