1, origin: origin is the most fundamental difference between the two. Huaishan's origin in the Jianghuai area of Jiangsu and Anhui, so called Huaishan yam, from here the output of yam is the highest medicinal value, such drugs are also known as Dao Di medicinal herbs. The yam produced in other regions is the common yam.

2, texture: the texture of the Chinese yam is more dense, hard as a rock, and relatively heavy; ordinary yam due to artificial cultivation of water is relatively sufficient, so the texture will not be very dense, but also relatively lighter, and it is easy to break.

3, incision: after the Chinese yam cut, the incision surface long-term to maintain a creamy white color, will not quickly turn yellow; ordinary yam in the cut, soon after the incision will be yellow.