Teak is cut, and rice and other crops are grown. Shan State is known for its garden produce of all sorts of fresh fruit and vegetables thanks to its temperate and sunny climate. Itinerant markets that travel from place to place, setting up on every fifth day in each small town or village, are typical, although large towns have permanent markets. It is part of the Golden Triangle, an area in which some of the world's opium and heroin are still illegally produced, and it has become a leading global production area for methamphetamine. Drug trafficking is controlled by local warlords in partnership with foreign organized crime groups, some of whom have private armies amounting to thousands of soldiers. Much of the methamphetamine ("ya ba") that ends up across the Mekong and wider Asia Pacific region is produced in Shan as well.