"Adsorption tower pressure is stable, and feed composition fluctuations remain within controllable limits—this optimization plan is working," reported the on-duty operator in real time from the control room of Liaoyang Petrochemical's aromatics unit on May 18. Over the past four months, by adjusting material flow directions, the company increased its cumulated para-xylene output by 4.1% year-on-year, setting a new record for the past five years and achieving a significant breakthrough in quality improvement and efficiency enhancement.