Ganguyi Town has the unique clay soil, sufficient sunshine, and large temperature difference between day and night, providing the favorable geographical and natural conditions for planting sweet potatoes which are sticky and sweet and taste very good. Sweet potatoes contain a variety of nutrients that the human body needs. In every 100 grams of sweet potato there contains 72.8 grams of water, 1.7 grams of protein, 0.3 grams of fat, 24.3 grams of carbohydrates, 3.0 grams of cellulose, 22.7 mg of vitamin C, 0.3 mg of vitamin E, 105 kcal, 22 mg of calcium, 204 mg of potassium, and 28 mg of phosphorus. In particular, sweet potatoes are rich in lysine, which is much higher than rice and flour. Traditional Chinese medicine believes that sweet potatoes “tonify deficiency, invigorate strength, invigorate spleen and stomach, nourish lung and kidney, function like yam, benefit people for long-term use, and are the food for longevity”.