Black truffle is a kind of wild edible fungus that grows underground. Its smell is very special and indescribable. Its taste is not as spicy as white truffles, but its fragrance is more mellow. In addition, black truffles have a smell similar to earth, and at the same time have the delicious taste of fish soup. Most black truffles grow in the roots of broad-leaved trees, scattered in the range of 120 ~ 150 cm at the bottom of trees, and most of them are hidden underground for 5 ~ 40 cm. Mainly distributed in a few areas of Alps and Himalayas.

Black truffles have been fascinated by many people since ancient times because of their special smell. In Europe, it is usually regarded as the top food, and its value ranks with high-grade foods such as caviar and foie gras, and it is known as the "three kings" of food. Because of its harsh growth conditions, the world output is very scarce every year, so the price is quite expensive, comparable to gold, known as the "black diamond" on the table.

Provence is the most important producing area of black truffles in the world, accounting for 80% of French production. The main production center is concentrated in the north, but it has become the largest black truffle market in France. It is said that this market is full of strange atmosphere, people all over the street are whispering mysteriously, and all goods are secretly seen, bargained and traded, so there is no truffle stand here. Truffles, the real protagonist, rarely appear. It is hard to believe that all French13 truffles are sold from this market.