In the fungal trade, the status of Boletus Edulis (also known as Porcini) is unshakeable. Due to the current inability to cultivate it on a large scale, each Boletus originates from the wild. This rarity determines its complex market grading and pricing system. Yihong, through professional brine preservation technology, transforms this highly seasonal delicacy into a standardized industrial raw material available year-round. This article will reveal all the secrets behind Boletus grading.