Cordyceps sinensis (scientific name: Cordyceps sinensis), also known as Cordyceps sinensis, also known as Cordyceps sinensis. It is a traditional Chinese herbal medicine named Cordyceps sinensis in China. It is a moth larva, parasitic on Cordyceps sinensis belonging to Cladosporium in alpine meadow soil, which makes the larva stiff. Under suitable conditions, the long rod-shaped daughter seat was extracted from the head of the summer stiff worm (that is, the complex of the fruiting body of Cordyceps sinensis and the sclerotium (larva corpse) of the stiff worm). Mainly produced in alpine regions and snowy grassland in Qinghai, Tibet, Xinjiang, Sichuan, Yunnan, Gansu, Guizhou and other provinces in China. The real Cordyceps sinensis is wild and grows on the grass slope near the snow line above the alpine grassland shrub belt at an altitude of 3000 to 5000 meters. In summer, put the eggs on the ground, hatch into larvae in a month or so, and then drill into the wet and soft soil. A mold in the soil invades the larvae and grows in the larvae. After a winter, when the next spring came, mold hyphae began to grow, and in summer, they grew out of the ground and looked like a grass. In this way, the body of the larva and the mycelium of the mold together form a complete "Cordyceps sinensis". Fungal spores feed on insect bodies and grow rapidly. The insect body is usually four to five centimeters, and fungal spores can grow to the length of the insect body in one day. At this time, Cordyceps sinensis is called "head grass" and has the best quality. The next day, fungal spores grow to about twice the size of the worm, which is called "Ercao", and the quality is second. It is called Cordyceps sinensis because it will grow roots when it hardens.