Sinopec East China Sales Company has set the butadiene price for Shanghai Petrochemical, Zhenhai Refining & Chemical, and Yangzi Petrochemical at 11,000 yuan per ton, an increase of 600 yuan per ton compared to the previous trading day. Sinopec North China Sales Company has set the butadiene price for Zhongsha (Tianjin) Petrochemical at 11,000 yuan per ton, an increase of 600 yuan per ton compared to the previous trading day. Sinopec Central China Sales Company has set the butadiene price for SK Wuhan Petrochemical at 11,000 yuan per ton, an increase of 600 yuan per ton compared to the previous trading day. Sinopec South China Sales Company's butadiene quotation: Guangzhou Petrochemical, Maoming Petrochemical, and Sinopec Zhongke Refining & Chemical are set at 11,000 yuan per ton, an increase of 600 yuan per ton compared to the previous trading day.