Mr.Sarun Rungkasiri, Chief Operating Officer, Downstream Petroleum Business Group, PTT Public Company Limited presided over the MOU signing ceremony on collaboration agreement of buying & selling raw coffee beans that is produced by natural conservation system between PTT agencies of Cafe Amazon and Sarn Palang Social Enterprise Company Limited and the community enterprises of Pangkhon Coffee and Akha Coffee, which held at Ban Pangkhon, Huai Chomphu of Chiang Rai province.This collaboration included the development of planting coffee trees and producing coffee beans, raw coffee beans procurement, exploration of distribution opportunity and self-development participation that encourages local employment.