Footboard potatoes, also known as purple yam, the scientific name of the hairy potatoes, growing at high altitude, the temperature difference between day and night is large, the appearance is irregular flat block shape, resembling a foot plate, so it is called footboard potatoes. Footboard potatoes are rich in a large number of anthocyanins, essential amino acids, mucus, vitamins, amylase and other nutrients, often eat, not only can increase the body's resistance to reduce blood pressure, blood sugar, anti-aging and longevity, etc., beneficial to the spleen, lungs, kidneys, etc., but also conducive to the treatment of cardiovascular disease, and play a role in antioxidant, cosmetic role, it is a very good dietary supplement, known as the "southern ginseng". It is a very good dietary tonic material, known as "Southern Ginseng" and "King of Vegetables". As a medicinal herb, the main treatment of spleen deficiency and diarrhea, kidney deficiency spermatorrhea, bring down, frequent urination, deficiency cough, thirst, sores and ulcers, soup and fire injuries. It has the effect of strengthening the spleen and stopping diarrhea; benefiting the lungs and nourishing the kidneys; detoxifying and astringing sores.