On May 28, partial domestic butadiene auction and sales updates: Dongming Petrochemical offered 280 tons for external sale with a floor price of 11,600 CNY/ton; Satellite Chemical offered 336 tons for external sale with a starting price of 11,800 CNY/ton. The overall crude oil trend remains bearish in the long term, dragging down market sentiment. Procurement sentiment in the market is becoming more rational, and it is expected to maintain a narrow-range oscillating trend in the short term.