
Underground
Either legal or illegal gold mining that takes place beneath the earth’s surface through tunnels, shafts, or adits dug to reach gold-bearing rocks.

Changfa
Miners use floating dredgers fitted with engines (changfa) to suck up sediments from riverbeds. Severe river pollution, destroys riverbanks and aquatic life.
Open-pit
Excavation of pits and trenches on land to reach shallow gold veins. Miners use Excavators, pickaxes, shovels, and washing plants.
