This research examined how soil properties and bacteria change during the growth of Chinese cordyceps, a valuable medicinal fungus found on the Qinghai-Tibet Plateau. Scientists discovered that the most critical stage occurs when the fungus infects and consumes the host larvae, during which soil becomes less acidic, loses nutrients, and experiences significant changes in bacterial communities. The findings show that specific bacteria like Pseudomonas and Dyella help the cordyceps grow by breaking down chitin from the larvae’s exoskeleton. Understanding these interactions can help improve artificial production of this expensive medicinal fungus.