Royal Projects and crop substitution
Northern Thailand was once part of the opium-growing Golden Triangle. From the 1970s, the Royal Projects led by the late King Bhumibol drove a transition to legal cash crops — coffee among the highland staples — to support mountain minority communities. Names like Doi Chang and Doi Tung are districts that grew into quality-coffee origins through those projects: an emblematic case of coffee intertwined with social development.