Shiitake is a famous traditional edible mushroom in China. It is an earliest manual work plant in the world. Shiitake with the advantages of abundant nutrition and gresh taste, it is regarded as "king of mushroom”, it contains tens amino acide, including isoleucine, lysine, phenylalanine, methionine, threonine, valine etc for human body, also contain vitamin B1, B2, PP and mineral salt.

Lentinan contain water solution fresh material, it can be used for food seasoning, main component is 5’ nucleic acid, aroma component is lentionione which decompose from Lentinan acid. So that lentinan is a very important food additive, seasoning and medical mushroom.