text: The leadership of Binh Son Refinery and Petrochemical said that in the same period last year heavy losses because of deeply declining oil prices and Covid - 91 caused the demand for petrochemical products to go down?
classes:  No, the difficulty of the year caused people to stop the oil permanently.  Also, the difficulty of the year caused people to stop the oil permanently.  Yes, the difficulty of the year caused people to stop the oil permanently.