Group 1 - The core viewpoint is that the supply and demand for PX and PTA are expected to marginally improve this year, with the PX-naphtha price spread stabilizing around $300/ton and potentially strengthening after the holiday [1][2] - The oil and petrochemical index showed a slight decline of 0.82% in the last week before the Spring Festival, while the engineering services sector performed best within the petrochemical industry, with a gain of 1.51% [1][2] Group 2 - Crude oil prices have increased due to a decline in U.S. crude oil and gasoline inventories, indicating a potential positive outlook for upstream companies if geopolitical factors provide further oil price premiums [3] - In the refining sector, an improvement in demand and progress in eliminating outdated production capacity could benefit midstream refining companies [4] - For polyester, attention should be paid to the progress of PTA's internal competition and PX profit recovery, as successful developments would favor the polyester filament market [5]