PX production could theoretically increase due to weak sales of refined oil products in China

Based on the profit calculation, PX production could theoretically increase due to weak sales of refined oil products in China, but in the actual manufacturing, the increment due to that reason is limited. Firstly, it would take time for refineries to adjust the production. Secondly, due to poor economics of refined oil products, the operating rate of some refineries, independent ones in particular hovers low, capping the increase of MX and toluene supply. Thirdly, there's restriction in terms of equipment of technology to use MX for PX production, hence the increment of PX is limited