Is locatedup 1,350 metres above sea level Doi Maesalong , Chiangrai in the northern part of Thailand . Which is a perfect climate for growing tea plants to product best quality Oolong tea.We care for every detailfrom the mountain, use no chemical fertilizer, plucking to harvest the tea leaf, thus to achieve the best quality Oolong tea to under the brand “ Emerald Thai Tea "