中国 was the global hub of MMO gold-farming in the 2000s — entire
工作室 (gōngzuòshì, 'studios') of players grinding currency in
魔兽世界 (WoW) and
传奇 (Legend of Mir) to sell to Western players. The phenomenon spawned Cory Doctorow's novel 'For the Win' (2010).