On October 10, the PP plant dynamics of a certain enterprise in Liaoning: the first-phase PP plant of a certain enterprise in Liaoning produced L5E89; the second-phase PP plant of 400,000 tons/year; the second-phase plant of 400,000 tons/year, of which the STPP production line of 200,000 tons/year was stopped for maintenance on September 18, and the start-up time was determined; the JPP production line of 200,000 tons/year produced K8030.