Nong Hoi Royal Project Development Center was established in 1974 in the area of Suthep Mountain -Pui National Park.It is the first-class watershed, the source of the watershed, and cultivates opium, so it was established for Nong Hoi Royal Project Development Center.It is to promote and develop farmers' occupation, replace opium cultivation by introducing new cash crops, and improve the life of mountain tribal people.
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