On November 20, Sinopec Zhenhai Refining & Chemical Co., Ltd.'s bid for butadiene is quoted at 7,200 yuan per ton. The specifications of the butadiene are: grade: premium quality; content, %: ≥99.5. The validity period of the quoted price is three days. The provider of the quoted information is Sinopec Zhenhai Refining & Chemical Co., Ltd.