Zaduo County is a key site for yielding caterpillar fungus, an expensive ingredient in traditional Chinese medicine.　Found only at high altitudes, the fungus, known in China as "winter-worm summer-grass," is said to be effective in boosting the immune system. 

The caterpillar fungus harvest time lasts 45 days. For local herdsmen, collecting this precious fungus offers them seasonal jobs and increases their income.