Report Summary 1. Report Industry Investment Rating - No information provided in the document. 2. Core View of the Report - No information provided in the document. 3. Summary by Related Content - **Positive Changes**: Products with positive price changes include propane import cost (FEI propane) with a 72 increase to 5,087 and a change rate of 8.2%, methanol in East China with a 125 increase to 2,687 and a change rate of 4.9%, and many others like asphalt in Shandong with a 2.3% change rate and an 84 increase to 3,700 [1]. - **Negative Changes**: Products with negative price changes include hot - rolled coil in Zhonghai with a - 20 change to 3,370 and a - 0.1% change rate, 20 - number rubber in Qingdao Free Trade Zone with a - 146 change to 14,818 and a - 0.1% change rate, and coke in Shanxi with a - 194 change to 1,441 and an - 11.9% change rate [1]. - **Calculation Notes**: The document provides calculation formulas for key indicators such as the main basis (main basis = spot - main contract), the discount rate ((spot price - futures price)/futures price), and the change refers to the comparison with the same period of the previous trading day [1].