Huaishan, a famous specialty of Yangshan, has the characteristics of white color, soft and smooth color, color, fragrance and good taste. Huaishan, also known as yam, is edible or medicinal with its large roots. It is rich in flesh and rich in starch. Huaishan has a unique flavor and is a precious vegetable. It is often used as a food in the tropics. It is also a tonic and a good raw material for winemaking. Huaishan is a perennial perennial vine plant. It is warm and not cold-resistant. It begins to germinate above 10 °C, and the growth of stems and leaves is 25 °C-28 °C. The tuber enlargement is the fastest at 20 °C-24 °C.