Living in the countryside for a long time, I think we are more popular than city people. At least many things can never be eaten in the city, such as wild vegetables and wild fruits in spring, which is the unique right of rural people. With the development of society, things in this countryside are becoming scarcer and scarcer. For example, today we are going to talk about "cow dung" in the mountains. Rural people use it to feed pigs, but city people call it "delicious on earth". It can be seen that we have the advantage and convenience of living in the countryside, which is the reward given to us by nature.

So what is this "cow dung"? There will be no suspense here. This game is called "truffle". Truffles have a special edible smell and are rich in nutrients such as protein and amino acids. Truffles require extremely high growth environment, can not be cultivated artificially, and the yield is scarce, which leads to their rarity and high cost. Therefore, Europeans rank truffles with caviar and foie gras as "three great delicacies in the world".

Scientific research data show that black truffles are rich in protein, 18 amino acids (including 8 essential amino acids that cannot be synthesized by human body), unsaturated fatty acids, vitamins, zinc, manganese, iron, calcium, phosphorus, selenium and other essential trace elements, as well as sphingolipids, cerebrosides, ceramides, triterpenes, androsterone, adenosine, truffle acid, sterols and pine. Among them, androsterone has obvious effects of supporting yang and regulating endocrine; Sphingolipid compounds have obvious anti-Alzheimer's disease, atherosclerosis and anti-tumor cytotoxicity; Polysaccharides, peptides and triterpenoids have the functions of enhancing immunity, anti-aging and anti-fatigue, and can be used for health care.

China also produces truffles, which are very similar in appearance to French black truffles. The scales of the outer skin are relatively small. The white stripes inside are fine. It mainly grows on the fibrous roots of pine trees. This is also the origin of the Chinese name of "truffle". The main producing areas are Sichuan and Yunnan. Mature China black truffles have a complex mushroom flavor, which is an incomprehensible smell.

Rural people don't understand the value of truffles, but urban people find that truffles are extremely nutritious. At the end of the 20th century, Chinese scientists discovered the distribution of black truffles in the southeast of Himalayas. In fact, truffles are called "fruitless" by local people in Tibetan areas in southwest China, Panzhihua in Sichuan and Yi people in Yongren County, Yunnan Province. China truffles are mainly produced in Jinsha River basin, and many truffles such as black truffle and white truffle have been found, which is one of the specialties of Jinsha River. Fiona Fang is centered in Yongren County, Yunnan Province and Panzhihua, Sichuan Province, and China truffles are mainly produced within 200 kilometers of Fiona Fang.