There are two kinds of yam: Dioscorea opposita and Dioscorea opposita, among which Lutu yam is the best. There is also the wild Huaishan Mountain growing on the mountain. That's a rare thing.
Dioscorea opposita, also known as Dioscorea opposita, is a sweet potato. Its root is used medicinally, and it is also called "Huaishen" because its efficacy can be compared with that of ginseng. It is a perennial twining herb, and its roots are fleshy and slightly columnar, with different lengths. Dioscorea opposita is a precious medicinal material with the functions of invigorating spleen and stomach and nourishing liver and kidney. There are many producing areas of Dioscorea opposita in China, but the Dioscorea opposita in Jiaozuo, Henan Province is the best. Jiaozuo was called Huaiqingfu in ancient times, so the Dioscorea opposita here is also called Dioscorea opposita. Dioscorea opposita Thunb. has always been evaluated by physicians as "warming and nourishing" and "flat in nature", which is a model of "homology of medicine and food" and can be used as normal food to satisfy hunger, and users have no taboos.
There is another joke about the characteristics of Chinese yam tonic. Tell men to eat women can't stand it, and women can't stand eating men. Men and women can't stand eating the bed. Then why not have a variety of spots? I can't stand planting too much. It can be seen how powerful it is.