The life of the bat moth, the host insect for the growth of Cordyceps sinensis, needs to go through the egg stage (about 45-72 days), the larval stage (about 680-940 days), the pupa stage (about 42-58 days), The adult stage of the bat moth (about 3-12 days) means that the Cordyceps bat moth needs a growth cycle of 2 to 3 years in its life. The Cordyceps bat moth overwinters in the underground frozen soil. The larvae that are not infected by the fungus will emerge as moths in June and July after two or three years. They are white at first, then turn brown-red one hour later, and then turn into brown-black. The whole body is long. It is full of spots, just like a butterfly. The female moth usually starts laying eggs a few hours after emerging, and lays more eggs after mating. The average female moth lays 400 to 500 eggs, and the maximum number can reach 700. The female moth dies immediately after laying eggs. The laid eggs turn into bat moth larvae after an incubation period of one and a half to more than two months. The larvae burrow into the ground and feed on the roots of plants. The larvae continue to grow under the surface, and the insect body gradually grows plump and white. , the bat moth larvae will not begin to be parasitized by the Cordyceps sinensis until they grow to the late third instar (the larvae grow for about one year). The Cordyceps sinensis mostly parasitizes larvae in the 4th to 5th instar. Fungal spores generally infect the larvae in August every year. , the larvae turn into zombies in October, and in November the zombies begin to overwinter after growing short fruiting bodies of about 1 to 2 mm on their heads. By May of the following year, the snow on the plateau begins to melt, the temperature and humidity rise, and the fruiting bodies (ie "grass heads") can grow on the surface. It takes about 9-10 months for the 4-5th instar bat moth larvae to grow into Cordyceps sinensis after being infected by the Cordyceps sinensis fungus. In addition, the growth period of the early larvae is at least one year. That is to say, it takes more than a year at the minimum to grow. It takes more than 3 years at most to mature Cordyceps sinensis.