摘要
China's big-three oil companies - CNPC, Sinopec and CNOOC - have intensified their competition in the domestic oil refining and petrochemical sector in recent years so as to better position themselves in the oil products market at home.
China＇s big-three oil companies - CNPC, Sinopec and CNOOC - have intensified their competition in the domestic oil refining and petrochemical sector in recent years so as to better position themselves in the oil products market at home.
