Development of the Manufacturing Sector in Each Province As agriculture is a major economic sector in all provinces in both the Golden and Emerald Triangles, value should be added to the products before trading. Currently, most agricultural products are sold as raw materials to manufacturers in other regions. The traditional trading culture in which the middlemen buy the product from the farmers and sell it to a third party is still in use. If there were agricultural processing factories in these regions, such as those for ethanol, sugar, flour, rubber processing and so on, the farmers could contact and sell their products to the factory directly. This process not only saves the cost of middlemen, it also helps reduce transportation costs as well. Thus, investments in related agro-industries in these regions should be promoted. During interviews with business operators in the region, ethanol manufacturing investors from other regions were mentioned. Since cassava, which is the major raw material of ethanol, can be planted in the region and also imported from Cambodia, an ethanol manufacturing factory would help to add value to local business. However, as production of ethanol requires know-how and a huge monetary investment, foreign investors or investors from outside the regions are needed. Manufacturing industry could be promoted in the regions since these provinces are located in Investment Promotion Zone 3 (22 provinces) which offers investment incentives, such as the exemption of import duty on machinery, a corporate income tax exemption for eight years and exemption of import duties on raw or essential materials used in the manufacturing of exported products for five years.