By the early-1960s, eastern Shan State festered with several insurgencies and warlords, and it emerged as a major opium-growing area, part of the so-called Golden Triangle. Narcotics trafficking became a vital source of revenue for all insurgencies. Major forces consisted of the SSA and the Communist Party of Burma (CPB), as well as those of the drug lords Khun Sa, and Lo Hsing Han. By the mid-1960s, CPB had begun receiving open support from China. Thailand also began a decades-long policy of support for non-communist Burmese rebels. Families of insurgent leaders were allowed to live in Thailand, where insurgent armies were free to buy arms, ammunition, and other supplies.