On May 11, Saudi Arabia announced that it would "voluntarily" reduce production by 1 million barrels in addition to the OPEC + plan, in order to maintain the stability of the global energy market. For a time, oil prices rose violently, WTI crude oil futures rose from a deep drop of 4%.     In the period of crude oil soaring and plummeting, the price of domestic chemical raw materials finally ended the declining trend of the first quarter, and the price rebounded and rose strongly!