On July 22, Sinopec Qingdao Refinery & Chemical Co., Ltd.'s bidding for propylene is set at 5350 RMB/ton. The specification of propylene is as follows: Propylene, % (V/V) Not less than: 95%. This bidding has a validity period of 3 days. The provider of the bidding is Sinopec Qingdao Refinery & Chemical Co., Ltd.