1. White truffle is one of the rarest and most expensive ingredients in the world, a kind of wild fungus and truffle. It was first discovered in Italy in 195 and is the most expensive edible fungus at present. Because of its preciousness, it is called "white diamond". This white truffle weighs 4.16 pounds (about 1.89 kilograms) and was discovered by the world's largest white truffle. The white truffle discovered this time is in Alba, Italy, which is located in the heart of Lange, a mountainous area in southern piedmont, and is the "white truffle capital" of Italy.

2. Truffles like alkaline calcareous soil, which is loose and easy to drain and breathe. It needs rain in summer, but it needs a little water but not too much, but it doesn't like the big and long rain in spring. Because truffles can't photosynthesize themselves to make carbohydrates for growth, they must live with the roots of oak trees and use the roots of oak trees to absorb nutrients. Therefore, the growth range of truffles is generally among trees.

3. Truffles like alkaline calcareous soil, which is loose and easy to drain and breathe. It needs rain in summer, but it needs a little water but not too much, but it doesn't like the big and long rain in spring. Because truffles can't photosynthesize themselves to make carbohydrates for growth, they must live with the roots of oak trees and use the roots of oak trees to absorb nutrients. Therefore, the growth range of truffles is generally among trees.

4. Because of the above-mentioned growing environment, it is extremely difficult to cultivate truffles artificially. For example, after planting truffle hyphae on the roots of oak trees, it is possible to harvest truffles after seven to ten years, if you are lucky. Over-ripe truffles will decompose and rot in the soil, release spores, germinate and grow into hyphae, and grow big when they meet the roots of oak trees. Because truffles are very picky about the growing environment, they can't grow as long as the sun, water or soil pH changes slightly, which is why truffles are so rare. It is precisely because white truffles only grow in forest areas and cannot be farmed artificially. In the past few years, the production of white truffles in Italy has been decreasing due to drought and heavy rain caused by climate change. Things are rare, because they are rare, so the price is very high.