PilSun Holding – Film Group: The 27th International Oil, Gas, Refining, and Petrochemical Exhibition officially started on Wednesday (May 17th). This year’s exhibition, witnessing a resurgence in the oil industry, features the presence of 200 foreign companies from 13 countries around the world. The 27th International Oil, Gas, Refining, and Petrochemical Exhibition is open daily from 9 AM to 5 PM and will conclude on May 20th.