Cordyceps sinensis, also known as Cordyceps sinensis and Cordyceps sinensis. It's called Cordyceps for short, and it's called "Ya Za Zhu Bu" in Tibetan. In China's rich medicinal resources, Cordyceps sinensis is a rare and exotic traditional Chinese medicine and Tibetan medicine, and it is listed as three excellent supplements with ginseng and velvet antler. From the ground, it looks like a grass, but its root is a worm, shaped like a spring silkworm, with a head and a mouth, and a reddish brown spot on each side of its head. There are 20-30 transverse links in the whole body and 8 pairs of raw feet in the abdomen. Insects lie in the frozen soil in winter, about 3 to 5 cm long, and in summer a grass grows from their heads. Cordyceps sinensis is actually not grass, it is a combination of insects and parasitic fungi. Insect is the dead body of Lepidoptera Cordyceps bat moth larvae infected by parasitic fungi. Because the larvae live in frozen soil in winter, they are called winter insects. Grass is the daughter of Cordyceps fungi on the head of parasite, which looks like grass. Factor block was unearthed in summer, so it is called summer grass.

Cordyceps sinensis is only produced in Qinghai-Tibet Plateau, with the largest output in Qinghai, accounting for 60-70% of the total output, followed by Tibet, and a small amount in Sichuan, Gansu and Yunnan. It is a fungus that likes low temperature, high altitude and strong parasitic specificity. When the temperature exceeds 20℃, it cannot grow normally. Mature Cordyceps sinensis fungi form a stroma on the head of parasitic larvae. There are about 5,000 fertile and visually recognizable ascomycetes in the stroma, which contain long cylindrical ascospores. When the ascomycetes break, the ascospores scatter and break into numerous secondary ascospores, which are scattered with the wind.

After the autumn of that year, Cordyceps sinensis began to have a sexual generation, and before the soil was frozen in that year, short daughter seats grew from the head of the infected host worm. In Yushu, Qinghai Province, parasitic insects can be dug up in late September, and the height of the head pedestal is about 1cm, and the soil surface is not exposed. After thawing in May of the following year, the soil temperature and humidity are suitable for the growth of ascomycetes, and the pedestal grows out of the ground at a speed of 3-4mm per day, which looks like grass. The pedestal turns light green at first and then purple, and generally does not continue to grow when the exposed part reaches 20-50 mm. By mid-June, the head of the stroma was gradually enlarged, and the ascospores grew in late July. From August to September, it gradually matures and radiates from the ascocyst, and continues to parasitize the host larvae.