Aerial view of giant oil tanks at Hengyi Industries' oil refinery and petrochemical plant at Pulau Muara Besar (PMB) in Bandar Seri Begawan, capital of Brunei, May 3, 2019. After the successful unloading of the first crude oil shipment on Thursday night, the oil refinery and petrochemical plant at Pulau Muara Besar (PMB), the biggest joint venture between China and Brunei, officially enters the stage of trial operation and production, Chen Liancai, CEO of Hengyi Industries said on Friday. (Xinhua/Hengyi Industries)