The use of yam

1. Gardens are often cultivated in all parts of China, but rarely in Xinjiang, Inner Mongolia and Northeast China. Widely distributed in Europe, North Africa, Iran, Mongolia, Siberia and the Soviet Union. Widely transplanted to North America. Born in wet grasslands, wasteland and along railways. Leaves and flowers contain aromatic oil, and the whole grass can be used as medicine, which has the effect of sweating and expelling wind.

2. "Zhou Li Chun Guan Arbitrary" said: "All major events in the country are praised first and then predicted." Among them, divination and divination are two ancient divination techniques, using tortoise shell as divination material and yarrow as divination material.