On August 23, Sinopec Qingdao Refining & Chemical Co., Ltd.'s quotation for propylene is 5150 RMB per ton. The specification of propylene includes: Propylene, % (V/V) ≥ 95%. The validity period of this quotation is three days. The provider of the quotation is Sinopec Qingdao Refining & Chemical Co., Ltd.