Living in a place considered a ‘barren’ land, people in the hilly area of Phong Son - Phong Xuan - Phong My on the west of Phong Dien district were once skeptical when a businessman brought tens of billions of VND back to his hometown to establish a manufacturing plant for producing medicinal essential oils. Now that they are convinced, and feel happy upon breathing in the ‘air fragrant with scents from medicinal herbs’.