(1) Chinese yam is thicker, especially the head. Except for the plants with thick heads, the lower parts are very thin and the skin of yam is smooth.

(2) There are many pits and spots on the epidermis of Dioscorea opposita, which are covered with rust-like spots and cannot be washed off.

2, the quality is different

(1) Yam is planted artificially by many people, and it contains a lot of water.

(2) Chinese yam is delicate and hard, and it is not easy to break. Its density is relatively high, so it feels a bit like holding a stone, and it is also relatively heavy.

3. Different places of origin

(1) Chinese yam is a kind of Chinese herbal medicine with dual functions of medicine and food. Because the climate in each place is different, it will affect the texture of yam. The main producing areas are Boai, Wuzhi and Wenxian. Among them, Shanxi, Shaanxi, Shandong, Hebei, Zhejiang, Hunan, Sichuan, Yunnan, Guizhou, Guangxi and other places also have a large number of cultivation, and yam planting areas are widely distributed.

(2) Yam is a kind of food with high medicinal value, which is called authentic medicine by Chinese medicine. The main producing areas are Anhui and Jiangsu, and the yam produced in these two producing areas is of pure quality.

4. Different incisions

(1) The surface of common yam will turn yellow as long as you cut it for a short time, and it will become smooth as long as you simply brush the skin when cleaning it.

(2) The section of Dioscorea opposita is milky white, which can be kept milky white for a long time, and it needs to be cleaned vigorously in the cleaning process.

5, cooking time is different

(1) Yam needs to be cooked for a long time before it can be eaten, but when eaten in the mouth, it has a feeling of melting in the mouth.

(2) Dioscorea opposita only needs to be boiled for 6-7 minutes to achieve the feeling of rapid population change. If you buy home yam and cook it for more than half, you must have bought yam, not yam.

6. Different functions

(1) Yam is a common food in daily life. I believe many people have eaten non-staple food made of yam.

(2) Yam is a kind of medicinal material, and we eat it more as a medicated diet in our daily life.