Cordyceps sinensis (Berk) sace is a fungus living on the larva of Hepialus armorcanus oberthur forming a compound of fungus in dead body of the worm. It is a special medicinal material produced on cold highlands of Qinghai Yushu disteict. The mycelia of this fungus are obtained by biologica technology (Liquid Fermentation). It is permitted by SFDA, widely used in health food, and really an ideal man-made subsititution of natural cordyceps sinensis