Yongyos Krongphanich, Executive Vice President, Finance and Accounting Group, PTT Exploration and Production Public Company Limited (PTTEP), welcomed the company shareholders to the Sirikit oil field at S1 Project, Thailand's largest onshore oil field located in Kamphaeng Phet Province. The shareholders also visited Piyachat Nithat Exhibition Center, Lan Krabue-M production site, Nong Toom Agricultural Product Processing Center and Wang Chan Royal Palace Historical Center which is one of PTTEP's CSR projects.