Rural people are very taboo about it, and city people earn to buy it, because of this.

There is an old saying, "move the ground on the head of too old", I believe many people have heard of this saying, as for what is too old, few people know. Too old, also known as flesh Ganoderma lucidum, is said to be the medicine of immortality that Qin Shihuang struggled to find. In the Compendium of herbs compiled by Li Shizhen, too old is still a kind of medicine that can be eaten and used in medicine. It is taboo to be too old in the countryside, but it is very popular to sell it at a high price in the city.

In the countryside, there is a special respect for nature, awe of ghosts and gods, and there are many traditions left over from ancient times, such as worship and fear of being too old.

But after knowing the medicinal value of too old, city people began to go on a buying spree.

The Compendium of Materia Medica compiled by Li Shizhen is an authoritative medical book in China, and it is the earliest and most comprehensive record of medicinal materials. In it, the description of "too old" is "eating for a long time, being light and not old, and prolonging the years of immortals". In fact, this is recorded in ancient times. now through scientific research, it is found that although too old does have great medicinal value, but the variety is very complex, it is not recommended to eat.