The two boys are cheerful when they finally spot a cordyceps.

For centuries, cordyceps has been regarded as having miraculous medicinal powers. It has been prescribed by herbalists to treat various ailments, including reducing cholesterol, and is reputed to increase stamina and improve eyesight. Depending on its size and quality, cordyceps can be sold locally for averagely about 250yuan ($32) per gram.

When the two youngsters find one, they cheer, beaming with joy. Their father rushes over. They use a small trowel to carve around the stalk and carefully unearth it.